I have implemented ASPDNSF for a few customers and its rich feature set rivals the biggest store fronts out there, and ASPDNSF can be gotten at a price point that is acceptable for small business. I have experience with osCommerce too and I feel ASPDNSF is much more flexible and easier to implement, plus it is in ASP.NET, making integration with .NET Applications much more plausible as opposed to osCommerce which is built in PHP.
Where as the technology difference apart, none of the open source solutions or even some of the commercial e-commerce solutions offered for DNN come close to the performance, rich feature set and ease of implementation of ASDNSF...
I think this is a good move for DNN, there will always be a market for DNN Store for the ultra price sensitive customer base, but for some that can spend a bit to get an enterprise level store front, ASPDNSF can be a welcome option, more over there are already other commercial store fronts for DNN out there, so why does ASPDNSF seem to be a threat to the DNN Store project?
Maybe this fear stems from the fact that ASPDNSF is so much better than the existing commercial and OS solutions out there, that it may overshadow the DNN Store project and eventually stiffle its growth... that is a probability... but on the other spectrum this integration will bring in huge support from the ASPDNSF base to DNN and vice versa, resulting in a larger community and an increased customerbase, read --> more bussiness for DNN and ASPDNSF Consultants.
The popularity, acceptance and sucess of any solution will ultimately be determined by market forces and resources available for that solution, which no one can control, but intentionally trying to give growth space to a project which is in its infancy by blocking an enterprise solutions is also not a good business decision.