Would you consider an EDU price? How about a one time purchase to own software license? It is a great app and I understand that paying users help support you to continuously improve upon it. However the current pricing already greatly dwarfs Microsoft's entire Office subscription plan and even Adobe's Creative Cloud. Yes, that isn't the fairest comparison given the size differences of the companies, but for the hobbyist such a pricing deters them from becoming invested in the software.
Affinity has two amazing apps that rival Photoshop and Illustrator on a few levels. Although expensive ($50), the one-time purchase is worth it for any user who occasionally has a need for high-quality projects.
For example, I use vector drawing software such as AI (now Affinity) for when I need to make scientific illustrations or posters. It is not even a weekly usage, but when it is used, it is done so intensively and for a great end result. I would like such a relationship with Shapr3D where I can dabble, explore and become a master of the software and process. However, I doubt I will ever use it for a purpose that justifies its current pricing. I would like to think I am not alone in this sentiment.