No I am not trying sell another plugin and quite frankly thats really presumptuous of you to say. The fact is your free plugin is pretty much crippled. While you may want to disguise that someone needs to pay $60 to get the “Pro version” which is not crippled and HIDE that as “support” is you simply fabricating the facts. If that were not the case people could simply download a non-crippled version and pay for support if they want it.
The plugin is not worth what you are asking. Why? Because a video gallery is not exactly an advanced application. A $2 game on a smart phone has more code, is more advanced than your gallery.
Again, where on your website can someone download a non-crippled version freely? No where. People have to pay $60 to get the non-crippled plugin. Right? Then you will give them 6 months of support. Then after 6 months if they want more you want another $60.
Can people download updated versions of the plugin forever? Or 6 months from now if an update happens they need pay it all over again?
Again, readers who read this. NO WAY is this worth $60. There are many many galleries on Envato far better, less money, pay one time and you have support forever, free updates.
ATOP ALL that most of the program code in your “Gallery” is code that other people developed.
For $20, perhaps $25 one time cost this plugin would still be overpriced but ok. To spend $60 so they can have a FULL NOT CRIPPLED version that you will then SUPPORT ridiculous. I have a good mind to pay the $60, add some things to it and release it for free since all WordPress work must have a GPL based license. Exactly what you are doing pretty much right?