Sort of O/T but why the free tier for your service?
I would think everyone with a legitimate need for an audit trail is a paying customer, in fact would prefer to pay so there is a contract around the audit trail, and “free tier” would just be a drain on your support resources.
We offer a free trial to encourage developers to easily try out and integrate the product.
Our free tier can cover low TPS usecases. We offer a free tier because we believe audit logs are too hard to build & consume and would love to see even smaller companies adding audit logs to their products.
I generally agree with the dimmish view of offering free stuff espoused on HN. However one upside is that grunts at largco can tinker on the side without contracts and all that drag. Diehard freeloaders will just keep signing up if you timebox it but it might filter out the casuals.
I would think everyone with a legitimate need for an audit trail is a paying customer, in fact would prefer to pay so there is a contract around the audit trail, and “free tier” would just be a drain on your support resources.