But getting traffic is where the competition factor comes in. I'm not saying someone will be more likely to buy from a portal once they know about your site, what I'm saying is that getting them to see you in the first place is hard unless you are pitching something different. As somone else mentioned, portals bid up to 0.50c per click on AdWords forcing would be competitors to make similar bids, which they simply can't afford. Same goes for all kinds of advertising, a big portal is always going to be able to pay more per user than you because with such a large catalog of games it's likely that customers will buy more than one game. If you are selling something different from what they are, then you can advertise on different kinds of site or for different keywords that won't have the portal shadow cast over you.