In order to make this in-app purchase you must have version 2.1 of BlackBerry AppWorld installed.
However before the application was approved it was changed to…
In order to make this in-app purchase you must have version 2.1 of BlackBerry® AppWorld™ installed.
So no real change, but apparently RIM’s lawyers thought it was necessary. Personally however, I think that adding these (essentially meaningless) marks just clutters up the text.