Because they kinda caught the opportunity? If Google didn't, someone else would.
> If Google isn't bringing anything to the table, how come they are so dominant and raking in so much money? Why couldn't Yahoo compete?
> But Google has been one of the biggest blessings ever for small businesses and individual founders trying to make a living.
Please note that competition in search market is different from providing small businesses with advertising opportunities. The "blessings" came from their position being the dominant search provider, not from their being Google.
How about cloud storage? iCloud, OneDrive, Google Drive, etc. Good apps support those out of box; for desktop install their client and use the file as you normally would.