We are doing exactly the same as Byteball, the proportion is the same. There at the moment about 95 Millions of ETH on circulation, we are issuing a token capped at 1 Million.
Byteball is capped at 1 million GBYTE and distributes 0.1 GB for every 16 BTC (and there are about 16 millions BTC as circulating supply), therefore we distribute 0.1 EBYTE for every 95 ETH.
0.1/95 = 0.0010526315789474
We rounded down to 0.001 because Ethereum is not capped like Bitcoin
Everything will be explained in the whitepaper though, which will be soon released