Perhaps they're just trying to avoid the reputation of Brazilians barring them from search filters and punter aversion to guaranteed "esstra babee".
If they're posting genuine pics then makes sense to brand away from the B&S crews.
Novelty factor, fishing for those tick list punters.
Plenty of dodgy Romanians who keep changing the flags they scam under "I'm Asian baby", "Muslim", "Italiano ciao!", "Spanish chica", "Hungarian MILF", "German", "Russian", "Polish"...