Don't use 0x payment processor, they don't understand bitcoin and flag coinjoins as AML risk apparently.
Discussion
After 1 day I received a refund, so decent enough customer support. I’ll only pay services with lightning so that I can make nostr:npub1yxp7j36cfqws7yj0hkfu2mx25308u4zua6ud22zglxp98ayhh96s8c399s happy about lightning privacy 🕶️