Putting my two cents here as well: please run a user poll for these mechanics before implementing them.

The ideas of taxes and random negative currency events seem extremely user hostile for a site that is actively losing users. By the end of this all you’ll have are the whales and potato sinks will not matter. I think the only potato sink that makes any dent on the whales rn is the custom clothing/pet maker. And you can tell by how often those users manage to roll multiple custom makers.

Not all of these ideas are bad, though and I think that would be reflected in a poll! The frog mechanic is interesting, I like that it’s optional. I probably won’t use it much as a casual player in need of potatoes. The idea of co-op potato donation events seems like it could be really fun!

It’s been suggested elsewhere but implementing one use potato sink items that maybe allow you temporary avi/pet/site cosmetics or some such and would encourage players to spend more money on a daily or weekly or monthly basis, whatever timeframe. Another idea, although I’m sure it requires more thought, would be a donation system where players could put items/potatoes in and get items out like the present giving mechanic during the big winter events. Raffles like Roundsey on FR would also be worth considering, with a chance for limited/kickstarter items or custom makers.