If you own super suite and contact sales directly, they will waive the subscriptions sigin up fee entirely and you can join the subscription program. The advantage you will have by purchasing is that if you ever cancel the subscription program your extensions will continue to work. 
I purchased CSS Suite, Dynamic Suite and PowerStore in the past few months? It irks me to hear this announcement after spending $560 on these products recently. I think waiving the subscription sign-up fee is a start, but I'm sure my feelings are similar to other customers when I say, "please sir, can I have more?"
Maybe waiving the full subscription fee for a few months or more? I don't think this is a matter of having your cake and eating it too. I think it's just a matter of good customer service and a great way to earn customer loyalty. (BTW your BestBuy example isn't great-- because they give refunds for the price difference)


