French to English Marketing Retail

The context is a luxury department store. Partenaires = its suppliers. The text is about how suppliers can pay the department store in order to enjoy different levels of marketing benefits which increase their exposure to customers.


Les partenaires fournissent les dotations d'un jeu viral (type bandit-manchot, tombola evenementielle, etc.) permettant leur mise en avant

I found reference to " tombola evenementielle" on this website, but hasn't made it any clearer to me:

http://www.stage.fr/offre-de-stage/canal--stage-assistant-e-...

Thanks for any help you can give on a Sunday evening!