Sorry, i didn't get it. What is the point holding YOU tokens on the platform? Or you should buy 'likes' as well?
You should not buy likes. When you like some photos you do not spend your tokens 
SELFLLERY just charges tokens.Wait what? Liking a photo costs you a money? I thought it was going to be more like STEEM where you have to hold your money and vote properly
He said when you like someone photos you don't lose any tokens, they charges Advertiser who want to promote his products and services to platform to us as users. In other words, Advertiser will make Contests that allows us to earn [ YOU token ].