Did anyone actually make profit with the guessing game?

I tried it 3 times with 100 on green/white/green and burned 3x100 SGs. From what I see you get 2x the amount you put in when you pick green or white and win. So it appears to be simply a way to burn your hard earned SG, like in a casino where the house wins in the long run. What are your experiences with it so far?

I played with it a while ago, maybe six or seven times, of which I won maybe three. I think I came out with -200 or -300 overall. Do not waste your gems on it.