If anything, the real reason why you might see a lot of 30.07 signs is because the state decided to delay the law going into effect for months after the bill was passed, and because all of the hoopla law enforcement made. This created a type of build up of publicity and news stories which became a part of the public consciousness. The whole Chipotle and Starbucks thing was fleeting, but the news going on everyday for the last 6 months of "what will happen once OC is legal?" or "how does LE feel about OC?" is more influential.