I have always tried to stress that the CFM crowd is actually a loyal repeat customer that EA wants to convert to MUT. In order to keep them as a potential MUT customer they have to continue to provide them with content to keep them purchasing and continuing EA's chance to convert them to MUT. I expect at some point you will see MUT rewards for Franchise achievement, as in win a SB for instance in CFM and get a MUT pack. By having that base of packs to start from some CFM guys could be tempted later in the release to cross over and therefor opening up the chance they could eventually purchase additional packs.
People need to realize that EA sees value in CFM as a potential revenue source which bodes well for it's continued sustainability.