Hello,
Thanks for your feedback.
If you want to have a notification email when the product is restock, you have to use the "waitlist"
www.hikashop.com/support/documentation/5...g.html#features_main
Regarding the payment that is done by payment plugin which support "authorize / capture" and there is already a setting in HikaShop to perform the payment capture on the order status modification.
Now regarding the goal of the plugin ; a lot of users asked for the possibility to sell products even if the stock reached zero.
The "pre order" plugin has been developed to answer to these requests.
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.