By purchasing this game you are agreeing to the terms in our Purchase Agreement. The purchase price includes unlimited game play for the indicated period. This is not a subscription, just a one time payment.
If you have gotten some entertainment from playing, we ask only for a small favor in return. Though we have enjoyed creating this game, it did take a lot time to develop and costs actual money to keep the game running. The game does not cost much, and we hope it provides much more entertainment value than its minimal purchase price.
The simple answer is: privacy. Companies that provide "free" games have to make money somehow and they do this by selling your personal information: your email, the games you like, the times of day you play, how long you play, and even scarier things. The "free" game companies sell this to other companies that are compiling a database of all your actions from other games and web sites. Your data is then sold to companies and agencies that use it to manipulate and exploit you in ways you might not even notice.
For those "free" games, they are only free if you do not put any value on your privacy!