Hi Ralf
I understand what you are saying
In which case I would completely change your front end. Your front end shouldn't be labor intensive and have staff costs IMO.
Personally IMO you either need to give 100% frontend which you state you cant do... Or change the product to increase the price on the frontend.
The only other way I an see it working as it is at those prices is if you tie the frontend to the continuity. What I mean is make it so if they take the $10 product it comes with a trial to the continuity so they are into the continuity as a result of the purchase.
This gives more incentive to promote.
I have a membership site that works like that with forced continuity and makes 5 figures a month, soon to be six figures a month. It works extremely well.
As long as you work your conversions and improve it consistaently then affiliates will love it. Just be sure to pay them well
Hope that helps
Dean