1. You will not have to pay money to play the game. Everything you were able to do until today, stays the same. Nothing changes there.
The magic items are simply extra options, they should not affect your game in any way.

2. Buying credits does not mean you will not have to follow the same rules.
You can and will be banned like any other player even if you have all the magical items available, so keep that in mind.

3. Players can now transfer credits.
Eventually, players will sell credits for avh coins.
Keep in mind that if you attempt to scam anyone you will be banned from the game.