try reading page 1 and you'll find the following quote
"Every BTC holder can claim his coins with the BTC Signature 1:1 1BTC = 1BTX.
The claiming period is 6 months until 02 November 2017. After this period we split the rest to the BTX Holder in steps. 10% from the unclaimed rest is for the BitCore Foundation.
We make small airdrop rounds in the future. "
After the 2nd of November:
How much will the airdrop be as a % ?
Will it be weekly or monthly ?
The devs are deciding if they want to do the airdrop at once or in multiple drops. All this info can be found in this topic.