Just want to reiterate I fully support what you're doing and I despise the megacorps that send out legal threats to small companies/OSS devs but according to their overbroad TOS they do not make distinctions between the types of automations and reasoning behind them - technically, they would argue, both you and your users are violating TOS. I'm sure you have already, but make sure the legal help at YC give you the ammo you need to protect yourself and your customers when some of them randomly start getting banned.
As more and more AI Agent enabled tooling comes out, this will become a bigger issue (the fact that people are automating these services against the TOS) so it's good if everyone who can get legal help has and shares the tactics to fight back against any civil TOS-based legal threats so we are all protected.