I dont think you should abuse of it as the ECU counts how many times you do a launch control..if done too many times you can void warranty 
Oh no Manu, not that old chestnut again

There are no written guidelines in ANY of VW's servicing, handbooks or guide manuals that state that if you use launch control more than X amount of times that it will invalidate your warranty. Some VW dealers have verbally mentioned it, but without any written knowledge for the customers in their handbooks, any enforcement of it is completely useless. If they didn't want you to use it they wouldn't put it in the handbook in the first place would they?!
