1. This service have different servers to monitor your arability from around the globe.
And you will need to pay for servers (if you don't have set of servers already) - in case if you write your own. But even 1-2 servers will cost you more then 5$. (1 DO server cost 5$/m just for server)
2. You don't need to worry about data retention, it's saved up to 1 year. (some type of businesses require to save their SLA and uptime information for some period).
3. It have things that already build, like SSL cert monitoring, status pages, consolidated dashboard, weekly summary, diagrams and graphs.
But still agree with you, for some people this service is not required or they can build it by themselves, but can be helpful for others.
But I will also put some comments:
1. This service have different servers to monitor your arability from around the globe. And you will need to pay for servers (if you don't have set of servers already) - in case if you write your own. But even 1-2 servers will cost you more then 5$. (1 DO server cost 5$/m just for server)
2. You don't need to worry about data retention, it's saved up to 1 year. (some type of businesses require to save their SLA and uptime information for some period).
3. It have things that already build, like SSL cert monitoring, status pages, consolidated dashboard, weekly summary, diagrams and graphs.
But still agree with you, for some people this service is not required or they can build it by themselves, but can be helpful for others.