Reading it right now, that was a lot of work

well done
I added this as a comment:
Upon proposal/submitting of a new Sphere there should be a sum of MVT to be deposited (how much need to be decided), this will serve as:
- spam filter
- a guarantee that the project is legitimate
- to "rent" land in Greenpoint.
Once the Sphere get approved by the vote of the token holders, the MVT deposited are moved in a general Fund/Wallet of the Movement which can be used to fund internal projects/works/contest or anything generally useful.
If the Sphere does not get approved the MVT are returned.
Exceptionally we could still allow creation of Spheres at no MVT cost depending of the subject and area of interest.