I'm a little surprised that their prices are so high. I don't condemn the idea, because I see that it can be redone and made much better:

As far as I remember, there was a similar feature in YouTube in the form of a test. You like the video, you press boost and the video starts moving forward more strongly. but interestingly, it was free.

As for GJ+, this can be implemented in the form of a club, where you will be given discounts on purchases of items in the marketplace and viewing some internal game analytics that the usual creator does not see. There may even be a group chat of participants where they will offer ideas for improving the platform.

500 likes, and I'm running for the role of creative director of Gamejolt lol.