Earlier quoted context omitted.
It's an interesting question (as far as tax can be interesting!), whether patreon and other contribution/donations systems count as gifts, or income from your work. I'm sure the tax authorities would like argue it is income, if you're making $8K monthly on patreon (e.g. Dwarf fortress creators).
Patreon seems to think it's likely to be income: https://support.patreon.com/hc/en-us/articles/207477063-Taxe... Which makes me wonder, is there some other way to aggregate donations such that they are gifts?
And “give €5 and get a sticker” might make it a sale, making it subject to VAT, too.