I installed it and tried it. It is very easy to use.
What I am about to try, only for test purposes is to use the amazon EC2 services. You can rent 18gpu with 1500 cuda core/card for about 2-3 $/hour. Even though GPU ox free version has 4gpu limitations, it is yet to be worth trying to use one gpu home and the rest(3) from amazon. I am very curios about the speed. The good thing is the first year at EC2 amazon is free up to 750 hours, if I understood correctly.
However 600/year is something that probably not everyone could afford. It is great for small studios, but probably not for individuals, or semi professionals and hobbyist.
They should do some in-between package/deal as between unlimited and and free there are plenty of opportunities, like 6,8,16 etc.
I am also wondering about a shared account and collab. it opens up a lot of possibilities. a system like that reduces rendering time so much that scheduling work between 1-2 or even 3 people is something that sounds very reasonable. At least for me.