I am curious how exactly the up time monitoring works. I have another service I use for uptime monitoring and recently had a site go down for 20 minutes. The uptime monitoring service notified me, however the WPMUDEV plugin said that the site was up and functioning fine. Seems weird that I would try multiple times to ensure it was working properly, and each time it would tell me the site was working fine - even though it was obviously down. How can I trust the plugin is doing it's job when it didn't work when a site was actually down for 20 minutes?