I don’t know if this is the right place, I don’t even know if this will post but I had a Jellyfin server setup with a router and static IPs however with my ISP supplied router I have to use my router as an AP or I’m double natted, no IPV6, the dumb thing is that I can’t set IPs static on ISP router. There’s got to be a way around this but I can’t seem to figure it out.
Yep, it’s against Cloudflare’s ToS. It’s a gray area as it seems you’ll only get flagged for heavy use. Either way I would advise against it and use the alternative options you mentioned.
Edit: Revised ToS