If that were the case the bigger companies with more money would be manipulating the rankings as well. If bodybuilding.com is favoring only MP, therefore allowing only Mp to manipulate the system you can bet your ass a huge lawsuit is in store. Bodybuilding.com would never risk their reputation on small little diluted MP.
Im very aware of the delucas but what your postulating would never fly with the biggest online supplement company in the world. Too many eyes watching and waiting for a miss step. Lawyers would have a field day with this favortisim you speak of.