If it's free, then you are the product. That's an adage that holds true in most cases, and in this case, your code is being used to train Copilot, among other things. Even if that weren't the case though, and the service really was as benevolent as you seem to believe it is, would you be sitting there clapping as the service gets worse for a decent subset of users? Is that exciting and interesting to you?

Do you have any references for this claim? I browse HN pretty much everyday, and "I can't do X without logging in" doesn't seem to be a popular type of post. The only example I can think of is Reddit's API changes, which were a while ago and loosely related to logging in.