Interesting stuff, looking at your blog I can see you have plenty of creativity. I have followed you and am looking forward to reading your future posts. As for the tip bots, one needs to hold and sometimes stake a certain amount of said token to be able to use the tokens tip function. The tokens can be traded on Hive-Engine. For Beer, once one stakes 24 !BEER they can use the bot command !BEER once per 24 hours. The more !BEER you stake the more times you can use the tip bot per 24 hour period. All the other tokens work in a similar manner. For !PIZZA I belive its 20 tokens that need to be staked.
Pizza bot command: !PIZZA
Beer bot command: !BEER