I think Patreon is winning because the people leading the charge care most about solving the problem (connecting patrons to creators). Gittip, while they are also clearly passionate about solving the problem, seems to have a big chunk of their passion/attention aimed at HOW they solve the problem (the whole site/process seems to be open-sourced: http://building.gittip.com/).
What they're creating is really a consumer-facing product/service. Are there any/many examples of consumer-facing OSS stuff that's better than the standard path of "find/hire amazing devs/designers/marketeers who love what you're building and pay them to kick ass?"