subscriptions for cheats? This is a WTF moment for me never heard of this kind of cheating.
The pay-for cheat industry
is way bigger than most people think and it's getting harder to detect. Some new cheats hide from Ring 0 kernel driver stuff like Vanguard by installing themselves as a Ring 0 driver of their own, whilst others involve having 2x PC's, you feed the HDMI output of PC 1 into PC 2 (like streamers often do) that runs a low-latency auto-aim AI that then observes the video stream then modifies the USB input mouse of PC1 (via a device that sits between them but passes through its genuine HID), essentially being an aim-bot that's completely undetectable to any anti-cheat software running on PC1 (and instead of "perfect snapping" each time, it's smart enough to vary it enough to make it look like the player is super good without being an infallibly perfect cheater). Given how it works, it also works on consoles as well as PC's.
Like many people, I believe multi-player peaked with LAN parties where you got together to have a laugh and lost interest as soon as it went online, became "mainstream social" and was soon overrun by the attention seekers self-obsessing about "muh online stay-tus". Lootboxes, "surprise mechanics", trolls, griefers, squeakers, DRM, anti-cheat that's just as bad as Sony Root kit was, etc, is just icing on the cake, and I'll take relaxing with a decent single player game over dealing with someone else's overly fragile ego any day.
You wouldn't have to sue them if you had sufficient anti-cheat solutions in place that would prevent them from running hacks, right? I'm not defending hackers but just recently we had a guy in Japan being sued by Nintendo for boosting saves for Zelda BoTW and selling his "service" online (which you can easily do on your own with a quick google so I don't see why would anyone pay for this). Next thing you know Ubi will sue people making trainers for AC games because it "ruins the experience" for players - we all know everyone loves to grind for materials in an AC game.
I think the war is already lost in favour of the cheaters. Things as described above (having AI based aimbots run on a non-networked 2nd PC and intelligent enough to remain below the threshold of what "patterns" server-side analysis is looking for) is undetectable both client & server-side. Even if I still were interested in multi-player, and even if it wasn't already bypassed, overly invasive client-side anti-cheat stuff like Vanguard's "Sony Rootkit 2.0" kernel drivers will never be installed on my PC no matter how "must have" the game is hyped to be. The only thing that stuff achieves is convincing me to play something else.