We do know, just ask anyone who runs a more popular site or does anything where abuse can be monetized (shopping, reviews, etc.). Avoiding that due to obscurity isn’t an answer because it’s saying you’re safe until something, possibly outside of your control, causes the bots to descend and give you an extra 500M requests with no chance of revenue.

I’m with OP: I don’t like this but the alternatives all look like the death of the open web.