If the service has no monthly fee, how is it being paid for?
Almost all monitoring services I found target enterprise, and the ones that don't are self-hosted. This solution is for the small teams/indie devs that just need to know when their servers down. Might raise the price though, thinking the low price might work against me for quality perception. What do you think?
One thing with the events model is that for some webhosts which do maintenance or small periods of downtime often a user might see many through the year. Or in other words the hobby dev might see them but I imagine a production level small team shouldn't be using those servers anyway