Hello.
1. The latest version costs $ 10 at the time of release, then after 1-2 weeks the price drops to $ 5. As soon as a new version of the game is released, the previous version of the game drops in price to $ 1, and the other previous version becomes free.
Example:
0.6 at the time of release was $ 10, now it costs $ 5.
0.5 costs $ 1.
0.4 is free.
2. The new version comes out after 1-3 months. The deadline for the events is running out.
3. This question has been asked many times already, read what players write.