There’s a particular Nostr client who charges for nip05 checkmarks. Sometime ago I found how someone was subverting their payment for a nip05 by being able to upload a json file through their media hosting and then linking to it. Apparently, it’s a non-issue for them, and the dismissal was written so passive aggressively. I guess they like loosing money and supporting scammers at the same time 🤷