As I'm sure a bunch of users have pointed out, the main page doesn't stay logged in. However, I've noticed that if I click on a comment section for a post, once that page loads, I'm logged in, and then when I go back to the main page, I'm logged in as well.
Dunno if it has anything to do with the redirects, but I do visit from voat.xyz and not upgoat.net (although I'm pretty sure the issue happens no matter what URL you visit from).
On voat.xyz it still works fine. On Upgoat.net i get a java script message, "wrong password" a few times, and then a message "you must wait until you can log in again".
I think it would be interesting to have the option for a feed that is based on chosen keywords instead of subs. E.g. each user would have a wordbank and the feed populates with posts that either have the word in the title or in the post description.
For instance, I prefer to follow certain topics like Christianity, but because these posts aren't always thrown in the same subverse it becomes hard to find what I am looking for in every case.
Yes, you could manually look for specific terms one by one, but I believe there is value in having a feed that would based on a range of user-chosen keywords. Especially if it were a tab up at the top beside "hot/new/bump"