Sounds like you want to buy drugs. There’s not a lot you buy online that you do so anonymously. Sure, there’s a few things, but for the most part it’s for goods and services that require your information in the first place. So what’s the point?
The best idea is just money cards that you can buy at brick and mortar stores for things. Advocating for a literal pyramid scheme isn’t worth it.
Cannot wait for this AI trash to become illegal and all these damn companies stealing tons of information against all known copyright laws to feed their half-assed AI garbage that outputs laughable results at best are forced to suddenly backtrack on their “LOL AI IS THE FUUUUUUTUUUUUREEEEE” bullshit.