Relatedly: Can I pay for this? Anki won't accept money, and it makes me nervous that one day the software is going to change and become unusable. I don't know how ankiweb can afford to host decks at no charge.
Once it has been added, I’d encourage you to look around and see if Scholarsome can fit your use case. To be upfront - this is still very in-dev. Anki is much more feature complete, and will be for some time, but I’m a believer in shipping fast and early to get feedback from users.
I don’t have any plans to monetize my hosted option. At most, I may add a donate button in the future. Releases are all containerized, so it should be easy to host yourself on a system under your control if you trust that more than using a third party.