Many sites also waive it for seeding torrents 24/7.

Not sure if it’s “many” but I’ll take your word for it. I double-checked the trackers I’m at and only 1 of them counts seeding as site/tracker activity. Seems pretty rare for private trackers to allow an account to exist without logging in indefinitely.

And with HD torrents it’s like once every 30 days

They have it set to 50 days.