Guys, What type of game is he playing?

I had met this guy and he dmed me on Instagram and he ended up giving me his Snapchat. We snap a little bit and he starts doing this thing where he would open the snap immediately, and then leave me on read for anywhere from 20 minutes to a whole day, but then he would reply. What’s the deal? What is he trying to do by leaving me on read for a while and then finally responding?
Guys, What type of game is he playing?
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