Thanks for the reply.

I just wondering why uptime monitoring Saas services have a pricing model about the count of monitors (25, 50, etc). I got that they trying to separate hobby users from companies but for me sounds more reasonable to have tiers about a count of servers, IPs, projects (limited by some resources cap) or tiers about additional features like grpc, graphql support, alerts filtering, etc.

Also, if you have a serious project usually it makes sense to set up rich monitoring tools so maybe users of such services have specific cases. Probably they have something like a lot of simple sites, or need a cover of API endpoints by monitors but don't wanna use complex tools.