Btw, Firefox seems to have made it impossible to run extensions uncrippled from source without uploading to their server for signing. Utter madness.
Secondly, how come there is no regulation about selling chrome extensions and apps?
What the market will bare doesn't just apply to product pricing.
And someone clicking through a EULA might be an argument for them having invited the use of their resources by a very similar argument to that many used to justify using other people's WiFi back when that was gloriously insecure most of the time ("but the AP broadcast its existence, effectively inviting me to join, and happily gave me an IP address to work with, how could I not believe I was welcome to use it?").
But almost everyone "a reasonable person" would not recognise or understand the technical words used in the disclaimer, nor even read all the way down where it's buried several links in.
However, this is not how these residential proxies are sold- mass market ones with millions of IPs are generally botnet/hacked/malware/extension malicious author sellout/etc./ There are not actually millions of botnet user, they just try to make themselves look big. Like they say AT&T has a /8? So they get 1 botnet hacked PC on AT&T broadband and say "wow we have a /8 worth of proxies!!"). Criminals not known for their truthfulness.
The ones that ask you $20-50/m and to plug something into your network is generally used for fraud, account hijackings and maintenance (getting a stable IP for stuff like a credit card checkout or paypal account to use for more than a few days for fraud, long term social media abuse, similar) instead of mass market ban evasion.
They don’t. For instance, Luminati, possibly the best known player in this market, uses HolaVPN users as exit nodes.[1]
[1] https://www.trendmicro.com/vinfo/hk-en/security/news/cybercr...