World Wide Brands is a joke if you ask me... I don't know of anybody that has made any measurable amount of money selling their items. Then again, I don't know anybody who has made a measurable amount of money with drop shipping either...
In order to make big money, you need to buy in bulk. Drop shipping lowers your profit margin to the point where any profit is eaten by ebay in the form of fees. The top powersellers are buying their items in bulk, not drop shipping. Its the only way that you can make money in a volume type of environment (It is tough to hold margin on ebay in my experience)....
Never pay anyone to sell their products.
Worldwide Brands charges $299.00 fee, Its like going to Costco & paying them to shop & spend your money at their store, why people do that is beyond my knowledge.
I hope this helps... Of course, all of my opinions are only based on my experience. Take care.
John (aka bacpro)