WeChat recently launched new official account called WeChat App Account to let developer run APP in WeChat official account without any installation.
Many people thought WeChat APP account is another gold mine. The problem is why Google and Apple allows the APP run in the third party server without any installation. That will drive the money of the APP selling to WeChat. WeChat App Account will get a big barrier in market.
The WeChat App Account still not launched outside China and only under beta testing. Developer can register to get this account in China, but not like the other WeChat OA, account without information broadcast will tough to attract followers.