I'm curious who your target customer for this? As someone who likes to work on side projects, this seems ideal for me, but I would imagine people will graduate to more mature solutions once they have decent volume. The concurrency limit is something that seems especially concerning in that regard.
We want to enable developers working on a side project to build apps faster and new startups to have a faster time to market by avoiding spending time on infrastructure and building custom layers of API and dashboard.
We also want to help bigger companies to take back control of their custom background jobs stack and to be able to ship new features or sub-products quickly. Again for growing companies, we provide Custom Pricing which comes with degressive pricing with custom concurrency to support, for example, high throughput needs.