1) Sell them asap, you'll be given 4 - 6 list of various types of posting, profiles, ect. Sell them on Fiverr, freelancer, and many other blackhat seo forums. Secret to this is being a part of the Russian xrumer forum, the admins give them the list a day or two earlier. You'll want to prepare by deleting the first and last few hundred links, this is done in case they are members of xrumer forum and they get the same list a few days later, they will not notice if they make a visual comparison. Lastly when you sell them sell a list for 3/4 of what they really are for example if you get a list of 8 million links from the admins sell them as 6 million links.
2) Post correctly to them, for profiles make sure xrumer is set up for profiles and the same for posting. Secret is to post to these quickly as possible before every other user begins posting to them. Very often they give out smaller list for posting and profiles, the trick here is to copy and paste these list over and over until you have at least 300000 links in the same file before posting. By doing this you will need at least 10 different email addresses all with the same password in your setting. This way you will have a few post on every forum, some will make it, and admin will delete some. Remember to only post to tier 2 and tier 3 using this method.
3)Use your question and answers section, but link to your new profiles. This will drive traffic and get clicks to your new profiles. if admins see you getting traffic they are more than likely to approve your link and profile.
Xrumer is by far the best out there for those who use it properly.