This is absolutely true; rather than just run at random, it will be important to work with the budget at hand. Advertizing on Facebook has worked for a lot of people. I have also heard that they also have paid-up ads?When you are on low budget. You have to find out what works with that budget. Instead of going for the traffic source that is random. You have to find one that works. Take FBAds for example, on low budget it can give you specific result. But as far as display ads are concerned they may not be good during the initial period. So it's trial and error phase.