Personally, I do check my analytics every now and then but there isn't too much actionable insight in there. Mostly, they're telling me that my main channel of communication (Mastodon) is largely ineffective for finding an audience.
Oh well.
I do not have any analytics besides what itch shows me. Tracking player behaviour in game just feels shady to me and, especially given the nature of my game, is not something I would be comfortable with.