> Some are sourced from bandwidth sharing SDKs for games with user consent...
The notion that most people installing a game meaningfully consent to unspecified ongoing uses of their Internet connection resold to undeclared third parties gave me a good, hearty belly laugh. Especially expressed so matter-of-factly.
Thank you.
To add, it's also strictly forbidden by all the major ISPs Acceptable Use Policy. At least in the US.
Legal? probably. Ethical? Absolutely not.
I don't think it's much different than games that force users to watch ads or capturing them in pay-to-win schemes.