This is a nice idea. I think folks who have been around for a while are familiar with karma cookies. But given the increased use on Telegram bridges, a post that explicitly reminds folks (particularly newer contributors) about karma cookies would be a nice idea.
Afterthought: can karma cookies be given using private conversations with zodbot? If so, we should suggest this as the way of going about it. Otherwise everyone giving cookies would increase channel noise (not that I mind, but that’ll hamper communication on channels).