Basically, Helpie was created as a community of ... helpers who are generally wonderful people. We power up and use our combined love to share around. Helpiecake was invented to do even MORE of that. Basically, helpiecake is the trigger for the larger account. If you are a 'Baker' (curator) you have access to the 'Kitchen' (channels where you drop posts to be upvoted and 'get cake' and chat with other curators).
There aren't any rules aside from "Be nice" and "Give cake (upvotes) to those who truly are doing a great job... or just need some encouragement".
If you are in Discord, you should definitely join a community or two. It's a crazy ocean out there, helps to have friendly fishes about. 🐟