This is a mastodon instance participating in a federated network of other mastodon nodes. This means you can and probably will interact with others who are not on this instance. It means that all of your route66.social data is residing on a server that I own (@firstname.lastname@example.org). I won't intentionally look at data that's not mean for me, but there's nothing preventing me from doing so, nor is any admin on any other mastodon instance prevented from looking at data on those instances.
I will do my best to keep this server running along with data backups, but uptime is not guaranteed nor is data-backup guaranteed.