If it's not opt-in, the software's spyware, pure and simple, and ought to be lumped in with other malware that should be rejected, shamed, and marginalized until/unless that behavior changes.
I'm sticking to our much-better norms for this shit from c. 2000, damnit! It really is crazy how fast and completely that changed.
No idea why you're being downvoted. The only difference between telemetry and spyware is there's a "legitimate company" with "legitimate interests" behind it.
Well, it's not as simple. Telemetry can be something as benign as sending error report when app crashed (which generally is useful if it doesn't leak other data and leads to better app), or as intrusive as tracking every click.
The context is also important, beta test of a game's entire point is to get that data to improve the product.
