Is it a good idea to add "Support us" button on the main menu

I'm thinking about adding a "Support us" button the main menu of the game. If the user clicks the button he/she will see list of ways to support the game, for example, like our facebook page, like our video trailer on youtube, google+, twitter, ... etc And this will not effect the gameplay or give any items. So the player can do a bit of PR for the game if he/she like the game, and want a sequel.

The game will be paid game but has a free demo that has half of the stuff locked. Its 2.5D space shooter type of game.

I see very few games doing this. Is this a good idea? Or will the player see the button as annoying plug?