Can you adjust something in your service so people can't jump in, use it, then never need it again? I don't mean to assume this is what is going on, but I imag

Can you adjust something in your service so people can't jump in, use it, then never need it again? I don't mean to assume this is what is going on, but I imagine some people may try to get their $ back if they just needed a web tool for a one-off task.