How to bring hunters to our COUPON page?

We want to finance our development with customer supporters in order to stay indie as long as possible. Our idea is to offer lifetime-PRO deals, so the supporters buy them now and get lifetime access to the future PRO features. If we sell enough we can finance our development and for the users, it's also cool to get access to PRO features forever free (with an early user number). But what is the best way to bring Hunters to the COUPON micro page before the PH-launch? Our launch is only supposed to happen when the product got some more refinements and iterations after implementing customer feedback and requests. Do you have ideas? Let me know!