As for the notification, you can set up your account to tell you when you get a thumbs up (in your profile settings:
https://permies.com/forums/email/preference) and currently the "top __ threads every__days you might be interested in" email tells you when you got thumbs up. You can also look up how many thumbs up you or someone else has gotten in the person's profile, as well as see who's gotten the most thumbs up in the
https://permies.com/forums/user/leaderboard. But, there's no way to know who gave you that thumbs up, just like you don't know which random pollinator, steward,
volunteer, or Paul or Burra gave you an apple.
Thumbs up, like R Ransom said, do go into the formulas for top posts, etc. But, I think more than anything, the thumbs up are a nice way to say "Thank You!" or "I like what you said there!" to a post. I love giving them out. Since I've got pie, I can give out two thumbs out per post...and I usually do when I like something. It's almost the same as a
facebook "like." It doesn't really do much, but it's fun to give and get, at least for me
.
I like that our forum has so many different ways to reward, inform, and encourage posters. Some may not care for the thumbs-up, and don't want to know about them. That's great! (I'd never realized someone wouldn't like that info--I hope there can be an option to "opt out" for people like R Ranson). Other's post more when they get thumbs-up, or like to know the background of who's posting. That's great, too! I like how Paul has so many ways to encourage more people to post more good stuff on here, so the knowledge can spread!