Number of clones

Your idea is interesting. At the moment, this feature has not been inplemented. I think it would be done with Javascript attached on the click event and update the Add more button class or disable attribute. I will think more about that and will imform you when it's done.

Not yet. I'm updating the Meta Box plugin with better way to get and display meta value in the frontend. After that (version 4.5) I will go back to limits of clone. Please wait.

Thank you!

FYI, we're adding a new parameter to field called "max_clone" to limit number of clones. The development version is on Github. We're testing and fixing some small issues before releasing new version.