When a chick gives you her IG, FB, twitter before her digits consider yourself curbed officially. If she give AF about you she dropping them digits cause she wants to get with you.
If she's not into you, she'll drop the social media cause it's a nice way of getting rejected without outright getting rejected. Basically it's a number to wait in line. I knew what the game was when a chick gave me her myspace URL back in 2006 and I never bothered to entertain that BS either.