Even if there are services like stripe and Auth0, as a solo developer it takes considerable time to connect all these together to get the basic functionality to actually sell things and integrate it into my product.
It just looks like they are offering there services mostly for non-developers (low-code / no-code) and I couldn't find anything about whether they have an API that I can use from my own code to check for registered users and if they paid etc.
EDIT: nevermind, found it: https://documenter.getpostman.com/view/3613332/outseta-rest-...
Well hopefully it you’re a developer it doesn’t take that long. I just switched a SaaS to Stripe from PayPal last week and it took less than 30 minutes. These SaaS support tools/websites are increasingly easy to use, making time to market for even a solo dev pretty easy.
I feel your pain personally, as well, so I built and already have an Ansible script I use to deploy Nodewood.com, but it turns out that Ansible doesn't play well on Windows, so while I'm happy to make it available to customers, I can't really justify making it the default deploy method.