So .. a suggestion .. your coupon system would be much more powerful if you added the ability to have it apply to members as well as products. Ditto for the Redemption Limit. I know these are not trivial changes, but for eMember users, IMHO, member-specific or member-level-specific incentives are going to be a frequent requirement.
In the meantime, would it be possible to give us a way of triggering the dynamically generated coupon code other than by a prior purchase e.g. immediately upon subscribing at a given membership level in eMember, and/or an admin manual process?