Who the f is Ziggy Quirk? Does she actually sell anything? That whole damn youtube vid is so full of s**t that I couldn't even bear watching it to the end. I make my living through SL and I don't care about people ripping me off. Usually they don't know how to sell my stuff so .. meh.
Wanna know what makes people buy your product for 400L when they can have it for 20L from someone else? Good marketing, honesty, you showing that you love your customers. Excellent support.
Just to name a few.

Jesus... Microsoft Windows only got famous because people pirated it. It's a new world - get used to it and adapt. And if you don't - please spare me all that whining.

A Content Creator in SL