I've seen a few product ratings stating "this product is not very good" I bought from 'InsertOnionAddress' and the pills were actually strong and cheaper. I've already seen 2 different addresses for OP Market and I've seen 1 for OWMarket with the exact same skin and features/registration as OPMarket. I went to the sites to see what the commotion was about (since there are markets not listed such as House of Lannister and WallStreet). As any smart person would do, I registered under a fake name and fake password since phishing occurs quite frequently. After you hit the register button, it brings up a registration is closed, invitation only message. Alas, they are phising for logins to steal from you.
Just a reminder guys, any time you go to check out a new market, always register under a fake user and fake pass to glance at it first. Especially if they are not on the reddit superlist or the deepdotweb.
a smart person would research that market properly before considering to touch it. if a market is not on the superlist, you should avoid it.
but you are right: you should use a different username, password, pin and pgp key on every market.