user470: I noticed today this reply which seemed like a biicode promotion, and after checking the user profile I saw another answer referring to the same company.
A look in the profile details of the user showed that she is working for the specific company, and based on the fact that her only two replies are referring to his company I wonder if there are rules regarding the issue of promoting a company.

Software Engineer at biicode

and in the linked website

I'm Julia S.Simon and I'm currently working at biicode.
Biicode is a spanish startup that aims to lower entry barriers for
  programmers making the hard stuff onf configuring project,
  dependencies and build for them.
Contact me if you need more information, or visit us and try it for
  free!


user220: 
Do not use signature, taglines, or greetings.
Every post you make is already “signed” with your standard user card,
  which links directly back to your user page. If you use an additional
  signature or tagline, it will be removed to reduce noise in the
  questions and answers.
Your user page belongs to you — fill it with information about your
  interests, links to stuff you’ve worked on, or whatever else you like!
Avoid overt self-promotion.
The community tends to vote down overt self-promotion and flag it as
  spam. Post good, relevant answers, and if some (but not all) happen to
  be about your product or website, that’s okay. However, you must
  disclose your affiliation in your answers.
If a large percentage of your posts include a mention of your product
  or website, you're probably here for the wrong reasons. Our
  advertising rates are quite reasonable; contact our ad sales team for
  details. We also offer free community promotion ads for open source
  projects and non-profit organizations.

From the help docs
If you see this, edit it (if needed), and post a comment saying that you need to clarify the relationship in the answer, since many people don't read profiles.

user65: While I cannot see the answers at present, in my experience of moderation over the past year, I have seen that sometimes people really don't know about Stack Exchange policies on self promotions. They are genuinely trying to answer the question, and an answer sometimes does happen to be an off-site resource being developed by the OP. As long as the post isn't blatant spam ("Buy handbags CHEAP HERE!!") and is an attempt to answer the question, the first response should be to comment and then delete with the not an answer flag. 
Also, note that the spam flag comes with many network wide restrictions on the user account, along with a -100 penalty, so it should not be used lightly and certainly not be used for something that could be considered a valid attempt to answer, albeit poorly written or sounding like an advertisement.

470: <p>I noticed today <a href="https://arduino.stackexchange.com/a/849/470">this reply</a> which seemed like a biicode promotion, and after checking the user profile I saw <a href="https://arduino.stackexchange.com/a/848/470">another answer</a> referring to the same company.</p>

<p>A look in the profile details of the user showed that she is working for the specific company, and based on the fact that her only two replies are referring to his company I wonder if there are rules regarding the issue of promoting a company.</p>

<blockquote>
  <p>Software Engineer at biicode</p>
</blockquote>

<p>and in the <a href="http://about.me/hithwen" rel="nofollow noreferrer">linked website</a></p>

<blockquote>
  <p>I'm Julia S.Simon and I'm currently working at biicode.</p>
  
  <p>Biicode is a spanish startup that aims to lower entry barriers for
  programmers making the hard stuff onf configuring project,
  dependencies and build for them.</p>
  
  <p>Contact me if you need more information, or visit us and try it for
  free!</p>
</blockquote>
 220: <blockquote>
  <p><strong>Do not use signature, taglines, or greetings.</strong></p>
  
  <p>Every post you make is already “signed” with your standard user card,
  which links directly back to your user page. If you use an additional
  signature or tagline, it will be removed to reduce noise in the
  questions and answers.</p>
  
  <p>Your user page belongs to you — fill it with information about your
  interests, links to stuff you’ve worked on, or whatever else you like!</p>
  
  <p><strong>Avoid overt self-promotion.</strong></p>
  
  <p>The community tends to vote down overt self-promotion and flag it as
  spam. Post good, relevant answers, and if some (but not all) happen to
  be about your product or website, that’s okay. However, you must
  disclose your affiliation in your answers.</p>
  
  <p>If a large percentage of your posts include a mention of your product
  or website, you're probably here for the wrong reasons. Our
  advertising rates are quite reasonable; contact our ad sales team for
  details. We also offer free community promotion ads for open source
  projects and non-profit organizations.</p>
</blockquote>

<p><em>From the <a href="https://arduino.stackexchange.com/help/behavior">help docs</a></em></p>

<p>If you see this, edit it (if needed), and post a comment saying that you need to clarify the relationship <em>in the answer</em>, since many people don't read profiles.</p>
 65: <p>While I cannot see the answers at present, in my experience of moderation over the past year, I have seen that sometimes people really don't know about Stack Exchange policies on self promotions. They are genuinely trying to answer the question, and an answer sometimes does happen to be an off-site resource being developed by the OP. As long as the post isn't blatant spam ("Buy handbags CHEAP HERE!!") and is an attempt to answer the question, the first response should be to comment and then delete with the not an answer flag. </p>

<p>Also, note that the <strong>spam flag</strong> comes with many network wide restrictions on the user account, along with a -100 penalty, so it <strong>should not be used lightly</strong> and certainly not be used for something that could be considered a valid attempt to answer, albeit poorly written or sounding like an advertisement.</p>
