Hi,
The secure-ebook plugin works with the secure-ebook platform. You can read more about the plugin in the HikaSerial documentation.
HikaShop have a good digital download system. For sure, we use it for this website to sell our products.
After that, in HikaSerial you have the consume system which would allow you to create consumable serials.
With a consuming plugin, you can execute special action when a specific serial is consumed (for a specific pack, of for all packs).
Our example plugin is a "group association" plugin. You can create serials which would allow user to join a specific joomla group by entering the serial.
But you can imagine a lot of thing, like an access to a private section of the website for example.
Downloading files after purchase is already implemented in HikaShop with all required features (limitation on number and duration) so HikaSerial would not be needed for this.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.