In fact, I know of only one ICO in recent times that has not done this. Blockgrain.io team had the foresight and fairness to keep presale price equal to the main sale price. This shows what intentions a team has. Less focus on greed and more on onboarding the right people.
You can get some tokens by promoting them on social media..If interested their BlockGrain.io bounty thread:
https://bitcointalk.org/index.php?topic=3332256.new#new