His data clearly shows most "sponsors" only sponsor him to view his webcasts. Is it really right to call that a sponsorship, as opposed to a subscription? What are the legal implications? (and yes, I'm aware that this is how most of patreon works too)
If you're interested in the issue, however, you might start by reading a little about "money transmitter" regulations. An early payments platform for open projects shut down at least partly on account of it. I suspect the concept of "perks" became widespread in part to differentiate fundraising platforms from money transmitters.
In the UK at least this kind of revenue is taxable and hmrc doesn't really care if it's called donation, sponsorship or subscription. It makes a difference when it's a charity of course but open source projects usually are not.
