All the blogs I read and vlogs I watch make it look like getting into the gaming app world is as simple as one, two, three and you will be an instant millionaire....question is what percentage of game apps are actually successful and make money?
Not many % wise BUT still a lot. Quality, uniqueness, fun'ness, marketing and luck all help. A large % are missing on one or more. I would say IAPs, making game addictive and to some degree the amount of marketing relate more to maximizing revenue but not whether or not you can be successful as a solo dev. If you want top of the charts, that's your path. With a solo or small team your definition of success can be easier to attain then top grossing.
What marketing companies would you suggest? They all seem to cost a ton of money....but I guess you have to spend money to make money. Any suggestions?