Stand alone sites VS. All for 1 low price, YOUR OPINION PLEASE!

Hi everyone,

If you run an affiliate program I would greatly appreciate it if you could offer your advise on the following:

I currently operate 3 exclusive paysites, each one runs separately of the others and charges $30 a month to join.

I have quite a few members that have membership to all 3 sites and pay $30x3, however I am trying to figure out if it would be better to combine all sites under 1 program that will give access to all sites for $30 a month.

So far I came up with these pros and cons:

Cons:

I will lose existing $30x3 members and $30x2 members

Pros:

*Conversion rate on join page will be better as I offer 2 bonus sites with each membership
*Members will enjoy more content from all 3 sites and stay longer
*Members will enjoy 3 weekly updates (one from each site)

I'm sure that for some of you it's an easy answer, after all most affiliate programs combine all sites under 1 roof, yet I do see a lot of programs that choose to keep their sites seperated.

Any input on this subject will be greatly appreciated. thanks!