Once again, please dont conflate "virtual" with 'fictional' or "made up". Many businesses in SL support their owners and staffs real life livelihoods. There are over 50,000 people who make part or all of their real life living from various 'virtual' real estate or content creation businesses in SL.
At the end of the day, what defines 'real' is what lets you bring home the bacon, does it not? I pay my family's real life mortgage with my company's profits. Several members of my staff are disabled and unemployed, and the only money they CAN earn, they earn from my business.
So no, theres nothing 'made up' about this. Were talking cold hard cash at the end of the day, and we work damn hard for it. Frankly, I doubt theres a lot of pink sheets that can claim even that.