When I was in YC (same batch as Dropbox) this was a constant question. "What happens to Dropbox if Gdrive launches?" I don't actually remember what Drew and Arash thought, but a lot of people speculated on it. It was probably a real threat to them 4.5 years ago. I can't imagine it is now. Dropbox has a large, happy fanbase that's going to keep using it and keep spreading. They're going to keep growing. They've got a…
Google is not the best with marketing, I haven't heard of any friends using Google Deals instead of Groupon yet either.