@miklo Thanks for your input!
The invitation was sent in various forms (Signal, Discord, Matrix, Email) to various communities.
As a non-profit entity we have access to free services from Google, so we are also making use of that to some degree.
We are building an open source-driven platform for IFTAS activities, participation will not require a Google or any other big corp account.
An open call for input on FOSS collaboration tools is here https://toot.wales/@jaz/110191955642892265