A: Hey!
Thank you so much for spotting it for us! It was erroneously put as 100. We have fixed it now :)

With regards to "What is the max number of groups allowed at one time (i.e. 20 groups of 6 meeting simultaneously)?"
You can have unlimited groups meeting at one time but the maximum current concurrency is 500. We are working towards increasing that in the near future :)

Hope this helps you!