Yeah, I also supposed that it would probably mostly fit in the free tier, which is great. But I'd lose a small amount of sleep over the possibility of getting a huge bandwidth burst (DDOS or otherwise) that goes straight to my bank account

A feature that could help would be giving people the option to set a cost limit, where if their site surpasses that limit in a given month you just pull it offline instead of charging more money. That's what I'd want for my blog site, and I've heard others request such a feature from other cloud providers