The setups as you have mentioned I would give 100% commissions on the frontend (Preferably immediate payout)

Then at 50% of your recurring backend
Sorry guys, if I give 100 on front end and 50 on backend that service will be dead.
It is support intensive and employees need to be paid somehow.
:

The core product as well as the support needs qualified people, and I don't want to reduce quality so that I can produce cheaper and keep affiliate commissions high.

I see your point of affiliates rather promoting other stuff then, because they can make more money from that given promotion. Maybe then I'd have to change the model.

So I bring up that question from above again:
Does this mean they lose their chance of being promoted through JVs?

Obviously a business does not necessarily have to rely on JVs and affiliates.
There are other ways to promote it.

Ralf