many clients default to only having a certain number of active torrents at once, which is not ideal. disable torrent queues and seeding limits.

because what you want is to have good chance that you're actually seeding something someone wants.

easy way to check this is to see how many torrents you think you're seeding on the client, and check on the top of the gtru page to see how many torrents the tracker thinks you're seeding.

My torrents never seed after half an hour of completion, what seems to be the issue here?

That timing would lead me to believe your client program isn't re-registering with the tracker as a seeder...

In my case, I use qBitTorrent, and to get downloaded content to seed properly, I have to set my client to re-check torrents after the download completes. Only that way, do my torrents start to seed properly after the download completes. (ALSO: When I upload content, I have to do that TWICE to get the site to accept that my torrent is seeding properly)!

If you use a different client, check to see if "resetting" the torrent's connection to the tracker solves your problem...