Inside of about 3 hours, Alpaca, went from blocking sales of some stocks to allowing sales of the same stocks:

AMC - AMC Entertainment Holdings Inc.

BB - BlackBerry Ltd.

EXPR - Express, Inc.

GME - GameStop Corp.

KOSS - Koss Corporation

NAKD - Naked Brand Groups Ltd

NOK - Nokia Oyj

I guess they don't want to get sued (the biggest fear of most companies)