I am not 100% sure, but if I remember correctly, opt out was per e-mail and not on the site.
Yes, that's what I remember as well. Note that they promised people (e.g. Sean) not to be included in partner deals, which proved to be wrong.
IMHO DP can't be trusted. For now, my port is still online there but I don't submit anything new since the 3%-royalty-partner-"deal"-discovery almost 2 years ago.