I remember an old mailing list discussion on sourcehut, because sourcehut provides a build service that you can use for automation.

The decision from sircmpwn was, at the end, to charge money for the service. Charging money and KnowYourCustomer will kill most exploits dead.

In this sense, this is turning the frustration level to 11. You can use the service to a certain extent, without frustration, but if you want to get serious then you're going to have to jump through some hoops.

Dedicated people will still find a way through, but you've cut off 95% of the flow and killed the low-effort attempts. Now, you can focus on the serious shit.