A lot of girls scam on snapchat, especially with the 'premium' content etc. Ive had a few girls try and scam me but ive never fell for it, (I know they scam because other people have said on forums). Its also so easy now for anyone on snapchat to upload pics/videos from their phone gallery so it could be anyone youre talking to. Originally you could only send content that was taken from the camera through snapchat.