One might argue that gay marriage succeeded because it is good for the economy. All gays I know are incredibly smart, savvy and professionally successful. They worked for many years and became a financial and political force, not to mention they succeeded in getting people to like them and empathize with their cause.
I think this is the point. The success of any protest movement depends on whether it can be galvanized into a political force. This can happen either when the protesters have economic and financial influence in terms of sheer numbers. Alternatively, it can happen when the protesters learn to organise in a way that they become politically relevant by voting along certain lines or candidate, but even here the numbers are important.
