5) So, TL;DR, with a factor of ~1.5 or so uncertainty:
Binance, Q1 2021:
a) $1B rev, $750m profit --> $4B rev, $3B profit run-rate
b) Blended average fee rate ~0.016% on trades
c) They're making it really clear that burn only goes until 100m tokens, but 60% of rev until then