I noticed that their "Mathemagician" is currently a Jr Meditation Teacher -
https://www.linkedin.com/in/tzanko-matev-2328425/

I've never heard such job for a PhD holder of Mathematics.

Anyway, as they said, even referring to your public profiles is not an assurance that you will not scheme people.
The only consolation is that it seems that this project has been in the works since last year so you're not a fly-by-night team by no means.

But as CjMapope said -