Yes there will be a bonus. The first third of the tokens will be sold for $0.2 each, the second third for $0,3 per token and the remaining tokens will cost $0,4. So being fast makes sense. The ICO will start in about 19 days, so still enough time.
That is actually a huge advantage, to buy the coins early. At the end of the ICO you will theoretically double your invested money. Usually you get like 30, 40 % bonus, but here it will be much bigger. After it hits the exchanges, who know how much will it be worth.
Yeah indeed there might be the possibility that a whale buys a big part of the cheap tokens. Maybe they can add a limitation, like a maximum amount of ETH one can invest in the first phase.