It's a good question, and we don't have a good answer for it yet. You're not wrong to be annoyed by this. It's a consequence of us being a young team with limited resources; if you do nothing to qualify free-tier users, then several people end up with the full-time job of tracking and shutting down abuse.
It won't make you feel much better, but this issue is very close to the top of our stack (we'd also convert visitors and window-shoppers better if they could boot something up without a credit card). The incentives are there for us to fix this; it's mostly a matter of time.
I'm glad you called it out.