Ask for Snapchat/Instagram or Phone Number?

Question is stated above. I honestly don't care which mode of contact I get from the girl as I use all platforms to communicate to people.

Some cold approaches I do however, I don't think go long enough for me to really get to know them or for them to know me: So I tend to give them my social media so they can see I live a pretty attractive lifestyle while we're not texting. I tend to post 1-2 times a day about something funny I saw or something cool I'm doing, which has actually attracted girls I thought weren't interested in me back to texting me out of the blue. Whereas some girls I got phone numbers for, just end up leading to dead ends after a few weeks if we both end up being too busy to see each-other right away.

Wondering what thoughts the internet has.