The contract is not void, and there is no chance of it becoming void for a long, long time. It will likely become void if/when I am not Legendary after 3 years, but that remains to be seen. I would advise aTriz not to try and "wriggle out" of the contract, because it puts me in a position where I will be forced to reveal certain things that he has done. If he sticks to the terms of the contract, as stipulated, he is my friend, and he will not be my enemy. Being my enemy is not a very favourable position for anyone to be in. 
"Pay me my money or I will do bad things to you."
Gotta love good old fashioned extortion
I think it would be difficult to argue that aTriz did not know alia was a "gambling exploit" seller considering he was actively assisting this fraud.
I believe aTriz entered the contract before she tried selling her gambling method for $10k USD. His vouch was in regards to her sexual-favor backed gambling services, which while suspect, at least had some loose form of collateral.
No extortion - I expect aTriz to remain in the contract. Thus I will do nothing yet.