This is a very tough-to-know-beforehand thing. If you look at the babes who sell generally well irrespective of who they shoot for there seems no pattern. I'd be very surprised if xxx doesn't think this too. Take randomly Lyna Cypher, Nicole Love, Angel Smalls and Sasha Zima. I could also mention the clearly talented Helena Moeller too. Four of the LP babes with nothing whatsoever in common but while 1 has arrived recently and sold even better than expected, but was still expected to sell at least good, the others have (Nicole) blossomed into a top youngster, (Lyna) surprised many with her ability and sales, and (Sasha) won over many people to be a top performer.
So, and I won't name names, why have others not done as well as you'd think? First off, bush is a killer. Granted. But why do some energetic, enthusiastic, willing, talented and attractive babes, with or without a huge Twitter following, not do so well? There is nobody here who won't be puzzled on occasion at a babe's lack of sales sometimes despite them ticking all the right boxes. LP hits the spot more often than misses but as highlighted above there seems no obvious reason
Trial and error seems the only way to know