Take a look at the mega thread, I've followed it to "awesomePiracy" and found this list: https://shakil-shahadat.github.io/awesome-piracy/#courses-and-tutorials
If it's something popular you may find your course in public torrent sites.
My tip: if you didn't find it anywhere, sometimes VPN to India will drop the price in 50-90% of the "original" price.
Just to iterate: your favorite torrent site, you've been avoiding is shutting down so you need a new one, to avoid enthusiastically
Try to open a controversial topic, let's say CCP or other heated sub reddit, Even when non political, mods straight power tripping when you ask serious questions.
But I think this is a reference for an old thread of "my wife think being a mod is not a real job"
The less straight forward way is to put a Middleware To query the IP with some geoIP site the get the info.
nginx+ supports geoIP blocking as well, there may be a free version of this feature
Iptorrents.com
They're going to randomize all vars and function names, mark my words.
VPN could be determined by the IPV4/6 blocks that was allocated to them.
My bet would be to use residential socks proxy.
In terma of cc, Maybe turkey paypal?
General tips: Don't login from non turkey IP (phone app could leak your IP even when app is closed for example, app sometimes pull/push data when closed ).
Could be ISP throttling, at least that's my experience with cross-country data transfer