I think the inherent weaselry lies in the fact that I opened Speed Download for the first time today, and entered my promo code from Mac Heist. The first time it downloaded something, it told me that an update had been downloaded automatically, and did I want to upgrade. Being a regular Mac user, I assumed this was a good thing and clicked 'Upgrade and Reopen Now'. It reopened and told me it was an unregistered version.
Nice. It wouldn't accept my Mac Heist code, as it was for the previous version.
I think that is the main problem - the lack of obvious choice.
The Speed Download uproar and why Yazsoft are not "weasels"