I looked up the skimmers. the older models of the elite are listed for $100 less than the newer identical models. The newer models are $100 more and have the VarioS DC Pump. Thus, there is a $200 difference between the external pump design with the older pump and the internal with the new pump with $100 difference being related to the VarioS DC Pump. Octo claims these pumps are specifically made for protein skimmers.
as for lost sales, seems the sales that would be lost would have been to people who could not fit the regular skimmer in their sump, but now for $100 more (apples to apples) can buy the smaller foot print model.
fwiw, my skimmer cost under $100 and my nitrates were 0 a few days ago, but then again, I rarely spend more than $20 on a coral. If I was spending $1000 on a bounce I might have a different view of my hardware choices.