I have been watching EOS ICO for few days, everyday has same trend , it will be around 0.5 usd per token than at last 3 hours ether starts to drop in the ico, to keep well alligned to price of coinmarketcap.
I don't think so it can happen everyday . Most to gain from it are exchanges like yunbi who have invested a lot in first window of ICO.
I don't expect to see price of eos going below 0.9 usd as it can be huge losses to yunbi.
See for yourself
https://etherscan.io/txs?a=0xd94c9ff168dc6aebf9b6cc86deff54f3fb0afc33&p=36
Above address is of yunbi, of course it is an exchange so many transaction may be legitimate , people buying eos from there ethers but if you look at the open the transaction which stands or above 20 ethers they trasnfer to EOS CROWDSAlE.
It may be the sherlock in me talking but I might be true
I have observed the same trend and was left with no option but to assume that the ICO is being manipulated. Having invested a couple of hundred dollars in the ICO, I am currently contemplating selling my tokens once they are available.