"Addicting" is the verb, "addictive" is the adjective. So they have slightly different meanings. "It's addicting" could work in the sense of "it is addicting people right now."
Lol, my original Batman was about upvoting, but I made it too wordy so I changed it. I thought about doing a 2 part job where I followed up with the upvote slap, but didn't :-(