One way to fund MangaDex is to set up a vpn-service. This way people will be able to bypass cloudflare and get faster access and a vpn as well. It’s obviously a big thing to start, and the best is probably to buy the post-vpn www-access from another provider, but considering how tech savvy some of the people behind MangaDex are I don’t doubt you could pull it off. Still there’s many questions about boring stuff, so if it’s worth it I can’t tell.
If you’re lucky you could find a provider that could specifically route the MangaDex users to the MangaDex servers while users could use an existing service, but this sounds like a big hassle as well since they would probably charge more than it’s worth
Edit: Actually I was overthinking this, it’s pretty simple but it probably has to be done in two steps:
1. User buys vpn access from the VPN service (and gets an account name).
2. User buys MangaDex access from MangaDex (and types in the VPN account name).
3. MangaDex sends the list of people with access to the vpn-provider (obviously via azure ad WHAT ELSE).
4. VPN-provider modifies the rules for these users.