Investors are not anymore willing to invest and get their investments (tokens even if it is security) months or years later.
Getting your tokens right after purchase is an even worse idea. If it would happen like that then people would be able to trade their tokens between each other and it will influence this ICO in a negative way. Second is that it is stupid af to trade shares of a project that did not even raise money to become somehow established and start this fucking project.
Maybe they could raise the fund to the profit of the trade and the payment of the coin's associate to the exchange platform I guess? Because as I can see, they can really make profit everywhere, what they will just need is the popularity and the market to help them gain fund that they will be able to use in the future development.