There is also this:
h. We reserve the right to require some verification in case of suspicious or fraudulent transactions;
Please define a "suspicious or fraudulent transaction". Without a proper definition, it could also seem like another method to take user funds (those that would rather stay anonymous than withdraw some BTC). Double spends wouldn't apply since you require 1 conf, so what is suspicious with bitcoin transactions?
Simple. Stolen coins, for example one's from Bitfinex hack. I do not want to be under FBI investigation for laundering those money.
Alex.