because with screen caps it was more difficult.
say a girl would flash a titty and you would screen cap a good pic of it.
then she would right away flash her vagina and youd try to screencap that, then youd lose the first pic and if you missed capturing the vagina, youd be out both pics.
it happened a couple of times then i was like fuck it...im using my cell phone.
also, with a screen cap, i have to go in and crop out the rest of the screen which was a big pain in the ass.