How do I invite other Geniuses to a Genius Loci place?

From the main menu, go to “My places”, click “Manage” and edit the list of Geniuses allowed to contribute to that place.

Who can create or edit content on my Genius Loci place?

Only people you have explicitly invited as Geniuses are allowed to create or edit content on your Genius Loci place.

Yes. From the same Manage section in My places, you can revoke a Genius's access at any time when they should no longer contribute.

In the main menu, go to “My places”, then click on “Manage” – you will be able to manage the list of “Geniuses” of the place.

Only invited people will have the right to create or edit content on this place.