For starters I think Facebook is way bigger here compared to most people in the West. This is something I see as well when I travel. Here, for (pulled out of my ass number) 50% of people online, the Internet = Facebook. Due to relatively slow internet adoption in the first dotcom era, there is very low expectation here that a shop will have a website and if it did it will have up to date information. On the other hand, small burger shacks will and do have a Facebook page WITH updated hours of operation and menus.
Anyway I'd love to write these things up if there is interest. I think most warriors will find it very interesting how hustlers here promote their businesses.