WTF? Who creates a system in which they can offer either some help now, or significantly more later, unless they are malicious or running an experiment?

Situations where you can get something now or something better later but not both come up all the time as consequences of growth, investment, logistics, or even just basic availability issues. I expect it would usually make more sense to do this analysis yourself and only offer the option that does more long-term good, but if clients' needs differ and you don't have a good way of estimating, it may make sense to allow them to choose.

Not that it's much of an offer if you can reliably predict the way the vast majority of them will go.