If you sign up to their Discord, you'll have about an hour to play with it.
It's not 60 minutes of our time, but rather 60 minutes of "GPU computing time" -- you should be able to play around with 25 images or so during that time. 😊
After that though, you have to subscribe to keep playing with it or spend a bit of time in the gallery voting on other people's images. If you vote on enough images, you'll get a free hour of GPU time again.