Do they even know what you're downloading or how much of it you've downloaded if they're using this method, though? Seems like they won't alert your ISP or send you a copyright strike unless they can confirm all that first.
If you're on a tracker list for a torrent that hosts illegal files, it's enough for a copyright notice. If an anti-piracy group was hired to monitor that torrent using that method (they all pretty much use that method now), they got you if monitoring while you were downloading or seeding the file, with or without blocklists. It doesn't matter if they weren't able to make a direct connection to you.
My guess is you're not seeding a lot, you're not downloading a lot of high-risk files (HBO, etc.), or some combination of the two.
Edit: A lot of people like you claim that blocklists are effective, mostly because they've always appeared to work before, but they are not effective. They do nothing, and the empirical data is clear.
This, I don't even pay the $5 to mega I just have to wait a little longer. But I've maybe used torrents a handful of times in this decade while using direct links hundreds of times without missing out on anything. Torrents you are always subject to getting a notice, direct links they have no way of knowing what you downloaded. I consider torrents in 2019 unnecessary they were useful last decade not now.
Exactly. The only people who know you downloaded something using a direct download are you and the file-hosting website you downloaded it from.