hi there
Snapshots will start be taken on an hourly basis, starting on July 14th to October 12th. Then, your total NXT will be averaged, and you'll receive that amount in Ardor tokens on October 12th, which will be freely tradeable up until the Ardor system launches.
i don't have to forge to make this happen, right?
btw: is there a way / tool to calculate forging revenue?
Forging is not necessary to be eligible for ARDR tokens. You can even keep your NXT on Poloniex and still get ARDR. But setting up your own wallet is recommended due to potential failure of centralized exchanges.
The forging revenue depends on how many of the 999 million coins are forging, how many coins you are forging with and how many transaction fees are paid in the block you forge. You can calculate your probability of forging a block. But you cannot know in advance how many fees will be in this block. If somebody issues an asset in the block you forge, you get 1000 NXT. But if there are no transactions in your block, you get 0 NXT.
The more users the higher the forging revenue.