I know Joe replied before that we will be here 'on our own' but I thought worth asking again because:
a) Perhaps a group license could be obtained in some manner
b) A few years ago (many) I purchased a product called 'Fort Awesome' , a premium version of Font Awesome, which had the same name than one of their icons (therefore confusing even Isaiah) and it turned out to be a waste of money since I could use the icons.... outside stacks. In the end, I had to settle for their incorporated into stacks version 3 of Font Awesome