What's the difference between 谢谢 vs 感谢 vs 跪谢 vs 多谢? While expressing gratitude in spoken Mandarin, I believe people use 谢谢 and 感谢.
For example:

谢谢你的时间
谢谢你带我来这里

And:

感谢你的时间
感谢你带我来这里

Does 感谢 imply a higher level of gratitude? Is there a difference in usage (stemming from culture, origin, etc.), or can they be used interchangeably?
I have also seen 多谢 and 跪谢 used in the signature of emails. Do these words implicitly convey different &quot;levels&quot; of gratitude?　
I am a little confused with the difference in usages of these 4 forms of thanks. Any explanations or suggestions?
谢谢: thanks, thank you.
感谢: thank you so much, or sometimes: thanks someone gratefully/appreciatively.
跪谢: internet slang, literally meaning: kneel down to someone and say thanks, like 跪求, same as 感谢.
多谢: thanks, thanks a lot, same as 谢谢.