But Sentry can be used for the same analytics as ads. You can send events manually, it doesn't have to be an actual error, with all the info attached.

I'm a very satisfied user of Sentry, but I use it for an internal project. I also use LogRocket which is far more intrusive. For public projects, I would use Sentry but certainly understand that many people would block it. I would never use LogRocket without informing users though.