morcmarc

There's also Blender. 3D modelling is arguably a fairly complex and large field (lighting, rendering, physics, simulations etc). Yet, the team behind Blender are doing an amazing job and the gap between commercial software (e.g. Maya, 3ds Max) and Blender are closing with every release.

There's also development and maintenance costs? Someone needs to build that web UI, android and iOS apps, kick those servers when they misbehave, answer the phone or reply to your enquiry?