If you don’t see stars, but instead there are letters S, this means that font with icons used by the plugin is not loaded by the browsers. The reason for this is that most likely your website is loading a font from CDN and some browsers are enforcing CORS policy. To get more information about it, and the solution on how to fix it, check out this article: Loading fonts from CDN.
There are few reasons for BBCodes not working:
- You have disabled BBCodes in the plugin.
- You have disabled some of the BBCodes in the plugin.
- You are using some 3rd party plugin that is causing problems.
The plugin that is often causing problems with BBCodes is ‘bbPress Advanced Statistics’, and this plugin will disable all Shortcodes/BBCodes by default. Either configure it properly to allow shortcodes, or remove it.
GD Rating System is adding a fully functional and standardized rich snippet for rating or review, and you can test all your posts to confirm that the rating snippet is correct. But, there is no way to influence Google to show the snippet inside search results. There is no way to know how, why and when Google displays rich snippets and even big websites like IMDb or Amazon very often don’t have the rich snippets displayed.
Check out this user guide about setting up the rating rich snippets.