no, its not. they get much more than 10 dollars out of you and will continue to do so forever. your computer hardware will degrade faster than if your computer wasn't used for mining, and in the long run will cost you more than if you just paid $10 in the first place for the game
Your computer is still degrading by running, it's just using a tiny bit more power. What, 2 days of computer usage is more than hundreds if not THOUSANDS of dollars gouged out of you by the owners of the game
most (non mobile) pvp games nowadays
I'm sorry, WHAT? Most free games on PC, mobile, or console (heck, even some PAID games) have in-game stuff you can buy THAT AFFECTS THE GAME. Even IF you can get that stuff without paying, it would either take multiple years, you're bound to lose it, or both.
and even in games that do that, those mechanics would not exist if they were using your device for bitcoin mining since the whole point of their existence is to entice people to pay for it - theres no reason to break your game balance if it wont net you more money.
I don't even know what you meant by this.