Investors were underwhelmed with PayPal's projections, despite the company increasing its forecast once again.Shares of PayPal (PYPL 1.38%) sank after its Q3 earnings report, although the stock overall has been on a strong run since the start of August. Meanwhile, it's up more than 50% during the past year.While the pullback was small, let's see if this is a good opportunity to buy the stock on the dip.Margins over revenue growthAlthough investors were disappointed with PayPal's forecast, it was actually th ...