Running lens Sustainability

Dear Devs,
The since the lens server is about to be setup I thought of some way to run it at cost. Of course I don't have the information on hosting cost.

The idea:
There are 4 tiers for the use of the lens cloud
Tier 0: Black Zero
Tier 1: Dev Patereon
Tier 2: Premium
Tier 3: Commercial

What are the tiers ?
Tier 0: Black Zero, is priced so that FreeCAD does not drain, it's resources on hosting, while being as cheap as Possible. Like sell at cost.
Tier 1: Dev Patereon, they pay for future devolpment of the Platform costs more Black Zero. Can decide what to Prioritize
Tier 2: Premium, same as Dev Patereon but with FPN (FreeCAD Professional network) included
Tier 3: Commercial, with FPN for each user, multiple users Payed for by the same Account

This Pricing is Transparent, the idea is if you did not choose tier 0 you can see what you contributed to.
A diffrent Idea was that the tier 0 price is dynamic and accounts for fees. Then we would need to communicate well how the tiers work.