Two ideas you may or may not have already thought of:

If you have back-end products to follow-up with, then offering a 100% affiliate commission on your lead product in order to build your customer list can be very persuasive to affiliates and move you to the top of their "to-do" list.

Can you create a continuity product that can pay-out ongoing commissions to your affiliates? Even if just a percentage of your customers take it (coaching program, ongoing membership site, etc.), this can be more appealing to affiliates than a one-time pay out only.

Hope this helps stimulate your creativity to other ideas for motivating affiliates.

Regards,
- Dennis