You don’t need to have your game completely done to know how it is going to behave. After validating the idea of the game through the MPV, you can also do a soft-launch.
Soft-launch means launching your games to a limited audience to gather information before doing the official and/or global launch. Usually game developers choose a specific country. Many choose Canada for having a similar profile than United States or choose their own country because of the proximity.
The most important metric in a soft-launch is retention. Some games stayed in soft-launch for more than a year before reaching the numbers desired by the team. It’s also important to measure how the monetization of the game is doing to make sure that is worth the investment with the official launch.
Cupcake games are always launched first on Facebook as a soft-launch, because measuring the information on web is much faster than mobile. In mobile you need the user to update the game in his device, which won’t always happen, as well as a longer review time. Updates on web are immediate and it is possible to have numbers the next day. We develop for mobile when the game reach the quality that the team desires. Nowadays we are doing this with Numbers of Gold, that was launched in the end of March on Facebook.