Roblox acquired a company for $11.6 million, and they’ve successfully managed to shut down every exploit that was present at the time, partnering up with one as well, and forced most exploiters to use Android, which doesn’t have Hyperion (anti-tamper) as of yet.
Also, if you want a fully Server-authoritative character that prevents exploiters from changing their speed, you should look into Chickynoid: