[quesera]

Sorry, I edited "distinct ACH info" to "distinct routing/account numbers" to be more clear, but evidently it was just differently-confusing!

A bank will only have one or a small number of routing numbers.

My point was that most banks will let existing customers open new accounts online. This will create a new routing/account number combination that you can share with the service you don't trust enough to share your primary account with.

You can also add a (new) debit card to the new account, and some providers let you create virtual cards at will. But that's not what I was talking about.