If you want an email and okay with anonymous - send an email. If you want verification of economic activity without the right to see that activity - ask for a credit card.

I trying to figure out the problem you want to solve here and how blockchain is better - but it falls apart. For one, most people don’t buy things with crypto and there are also many different coins on top of that. So even if tie an email to a particular crypto address, it’s not likely the average person can prove they have economic activity.

Then the motives are wrong on both sides anyway - I don’t want services I use to have a copy of my spending history, and they want a way to deanonymize me to discourage abuse, or charge me for their services. Neither of which sounds like it is part of what you are suggesting.