I have found a exploit of the spin2win, if you spin the spin2win and press I for your inventory, you immediately get the coin/item from the spin2win, and someone can do this multiple times. I'm am sorry I couldn't provide a photo of it because it happens in a instant.
I feel like this might be better if you tell brass yourself through steam or pm. Sounds like something that can be easily abused
This actually isnt very exploitable.
After performing it ~5 times, spin2win will force you into cooldowns. It stops you from rolling too fast.
But next time you think you've found a bug, make sure to Pm brassx instead of making a forum report. =)
There's a cooldown serverside for spinning. This isn't really any exploit.