If you are looking for an alternative then please take a look at NeetoCal https://neeto.com/cal . It's closed source though.
Disclosure: I'm the CEO of NeetoCal.
Disclosure: I'm the CEO of NeetoCal.
I perceive and classify your business model as a product optimization race-to-the-bottom model, if it makes sense. Have you considered or are currently working in the Field Service Management (NeetoService) space? Perhaps an ERP (NeetoERP)? Honestly curious because they're both sorely needed.
Thanks again for your AMA-ability. ;)
I would only pay for something open knowing I have the freedom to self host if I ever need to.