Similarly, the blockage could come from the other end. The seeders could be partially blocked.
Even VPNs block or can be blocked.
All we can do is seed. And unless someone else is looking for it, it won't upload to anyone. Most lie dormant for ages and then when you're not looking you'll check the stats and find you've uploaded a few copies.
I set my ratio at 10.0 (or 1000%) and give away 10 full copies. However, I'm an uploader, so that is usually gone in a few days. And only reseed after that if I notice a reseed request.
This site, and the whole protocol can be very hit and miss. It's best to just jump in when they're uploaded.
And, of course, upload yourself.
