Is there any reason why do you need to ask for people to suggest the provider for the upcoming casino games multiplier contest? Does it mean that the contest will be limited to few or some specific providers only?
Letting participants to choose any game they like will be much better IMO, if it will be limited to few providers only, participants may not be able to play if the providers restrict the country where the participants come from unless chilistakes guarantee that all games are playable for all players regardless where the players come from.