I am thinking of buying Vue 5 Infinite.

E-onsoftware (the company that makes Vue) indicated that those who purchase Vue 5 infinite now  would get a free upgrade to Vue 6 Infinite when the latter is eventually released.

But how would one KNOW for sure that E-onsoftware will actually uphold their end of the deal?  Are Vue 5 Infinifte purchasers given a free Vue 6 serial number / login / code?  Or does one merely have to trust E-OnSoftware's purchase records, and expect them to contact you when the free Vue 6 upgrade is released?

Thanks.