Q1: Is this APK site available on the Google Play Store?

It's not available on the Google Play Store.

Q2: From where can I download the 966PK game?

You can download it from any official and trustworthy platforms online.

No, some game modes are free, but some require real money deposits.

It's only for entertainment. Earnings are unsure and uncertain. It's unpredictable.

The download will start in seconds.