I'll take a stab at the answer: 1) Their PPC marketing has been solid since the beginning. They really did an excellent job at targeting and remarketing to bu

I'll take a stab at the answer: 1) Their PPC marketing has been solid since the beginning. They really did an excellent job at targeting and remarketing to build the brand name since the beginning. I have to laugh, as they are the top result for "Google Website Optimizer". 2) Google's shutting down of GWO as a standalone product seems to have benefitted them nicely. Frankly, I was seriously considering Optimizely after GWO shutdown. I decided to give the Google's new optimizer built into GA a try, and it is actually much nicer to use than their old standalone product. Of course GWO/Experiments is terrible when someone other than developers are designing the A/B tests.