Adjust subscription debounce algorithm
Adjust subscription debounce algorithm

Previous implementaion meant if there were more than 10 subs between the
user's subscription notice in chat, and the delayed check from the API
backend, then the user would show up in the list twice.

Make the debouncer based off time, rather than a number of subs.

andreasots/lrrbot,mrphlip/lrrbot,andreasots/lrrbot,andreasots/lrrbot,mrphlip/lrrbot,mrphlip/lrrbot