If you look at similar platforms based on "real" money (as you put it), you will see these are actually relatively high budgets for these projects. Take a look through the projects over on odesk and weep: https://www.odesk.com

Given that though, yes there is an allure to bitcoin. Many people believe they will be worth more in future, so may willing to work for lower rates in order to get some and participate in the "bitcoin economy".