Actually, the player had teammates playing in another league, his college coach wanted him to play with them, on the same team,and the player requested a release, telling the CPL team where he wanted to play. The team's coach replied something to the effect that if the league to which he wanted to go wasn't the Cape, he didn't think a release would be forthcoming. There was no stealth.
The standard CPL contract is very broad and prohibits any baseball activity, organized or unorganized, compensated or uncompensated, anywhere else.
As has been mentioned, these teams do require a lot of work to operate and support, but it's a labor of love for most.