ISP provides log your traffic for years, after that i am not sure what happens. Maybe they keep record of the ppl who tried to log into certain websites and go over it over time. Maybe they just keep them as extra evidence when something comes up. Also we are only taking about ISP, a government has more tools than that. Egypt alone spend 7 billion dollars on electronic surveillance. As for source, i am talking out of my ass, not in the sense i am making stuff up just that this is what i deduced from going over bunch of forums, articles, YouTube and privacy subs on reddit. I kinda of freaked out cuz if its true, i have already got myself in the waters and so abandoned all my researcher but aslo cuz like i said mental down the shitter