Hi! You can look on special donation bot called dobrobot. It works for more than a week in Golos network. It differs a little in its mechanics to regular bots (as in Reddit) because it gives autotips each time you cast a vote for somebody. More than 15 people are using this bot right now in Golos, which is shown on special statistics page with personal balances.

Disclaimer: I'm not a developer of dobrobot. @ropox is. I'm just an author of the idea.