So, this is strange. I've thought for a decade that the "pro" in "prosumer" came from "professional". I.e. they're people who want to buy industrial grade equipment for hobby use. I've never before seen it be used in a context where the root is obviously "producer" instead. But the Wikipedia article doesn't seem to even acknowledge the first definition.
It is weird. At first I thought she meant the same, and was going to say that calling yourself a pro consumer is silly if you aren't paying money. Dictionary built into Bing (accessed via Cortana) gave me the same definition you had. I'm not sure if the Wikipedia article is particularly good or up to date; it uses the term Web 2.0 seriously.
