This is hard to answer in general, without looking at specific case of what sale of license implies for specific product. For general GPL compliance note that what is typically licensed is not code. You just get code provided. What license buys you are usually things like access to support and updates. GPL doesn’t regulate … Read more
That depends upon the seller of the theme. Contact them if their license is not clear about this. I ran across a couple of sellers of plugins (not sure about their themes) that have a special license specifically for multisite networks, while others say that if the sites are related in use (say one business’ … Read more
This is helpful to you having same features what you need http://wordpress.org/extend/plugins/appointy-appointment-scheduler/
Depending on third party plugins for theme functionality
What will happen if i deactivate my visual composer plug in? [closed]
No, they don’t need. They will need to go through the approval process of the marketplace where you will sell them (if any).
A combination of the S2 Member Plugin along with something like Advanced Access Manager would probably work best for you. You can set up subscriptions and pages access in S2 Member, and use Advance Access Manager to adjust roles/access or create new roles. (AAM is perhaps less functional than the ones you mentioned, but WAY … Read more
Yes, you should use wp_mail(). There is no difference between a premium theme and a regular theme in this point. wp_mail() has many advantages and your clients will rely on it. If you break it, many plugins will not work anymore. Besides that, it is not the job of a theme to change this functionality. … Read more
A “secret” full text feed Here’s a demo plugin that gives you a full text feed at: example.tld/secretfeed/ Just remember to flush the rewrite rules, e.g. by visiting the Settings/Permalinks page: <?php /** * Plugin Name: Secret Full Text Feed * Plugin URI: http://wordpress.stackexchange.com/a/208724/26350 */ add_action( ‘init’, function() { add_feed( ‘secretfeed’, ‘do_feed_rss2’ ); }); add_action( … Read more
WordPress is licensed under GPL, which according to WordPress means that all WP plugins must also be licensed to be GPL compatible. There is debate about that, but almost all of the plugins in that person’s GitHub account are explicitly licensed under GPL. Under GPL it is technically legal to redistribute (including selling) the actual … Read more