Furthermore, it's in no way illegal by legal terms or WGT T&Cs to interrupt or quit playing.
But, speaking of experience points, this
WGTShamWow:Please note that experience is gained after each stroke and not awarded all at once at the end of the game, so you are not loosing experience.
is not quite correct. While the individual XPs for the shots are granted one by one at each stroke, the bigger part of XPs is granted after finishing the game. These are lost together with any award XPs in case of uncompleted games, both for player and CC. Also will it not count for the CDP
And, I'm afraid, it won't loosen up anything, SCNR.