[icedchai]

I built a billing system for a web hosting company in PHP, almost 20 years ago. This was for a few hundred users. There were a couple of edge cases, but nothing incredibly challenging.

[Rafsark]

Was it a basic subscription model or have you faced challenges with taxes, usage-based components, entitlements, grand fathering?

[icedchai]

Basic subscription and it was 20 years ago. There was some grandfathering but that was pretty simple to solve with a status column on a plan table, etc.