Hi,

check out this page: https://eos.io/instructions

Theres a formula that explains the distribution. Said short: The more people/ETH are involved during a period, the less tokens everyone gets.

Whats cool: You can choose during which period you want to invest. For example if you think ist all a big bubble and after a while less people will invest (lets say after 2 weeks) you can place your Investment during that persiod. If youre right/lucky, and only very few do invest you will get a big chunk. The other way around: If ist all heating up you might get less for the same amount of ETH and it would be smarter to invest now.