EDIT: Got my horse this morning! Removed my referral link, please use one of the many others in this thread.
Trion finally started a trial program, it's through referrals only so if you want the 7 day trial, here is my referral link...
I'm not sure if there are any restrictions on the trial accounts, it didn't seem like it. And here's the page that shows the benefits for both the referred person and the referral:
https://www.riftgame.com/en/products/ascend-a-friend/