Scribe
Legend
Very few. Depending on what sustainable means to you.How many pros were getting a "sustainable living" anyway, unless they had a side gig writing for SCG or something similar?
Pretty sure these folks didn't all have 100K annual contacts.
The wider impact will imo be unfortunate. More resources directed at EDH, with even less regard for competitive constructed formats.
It's been a long decline, but their stupid F.I.R.E. approach finally did it.