Because the aim of faircoop isnt to become rich. As I understand, it want to spread the coins among all that you don't have the accumulation of money in one or few places/people, like you have it now with BTC or most other currencies.
So motivate a lot of people to buy/accept/mint FAC now means, that all this people could participate in the increase of the price of FAC. And as more people have FAC as more can spent them for real trades (not FAC to other cryptocurrencies).
For me bittrex is less important. It just tell me now, that some people are guessing that they perhaps can sell FAC later with profit. Much more important for me is, that faircoop spent energy in increasing the acceptance in "real" stores/trades. That you can buy real goods for FAC.
As more success they have there as much FAC is increasing in bittrex.
good luck and...bye