Hi,
The fees (for configuration, vendors, products) are stored in the table "hikamarket_fee".
The column "product_vendor_params" is here to store some parameters for HikaMarket, like the plugin "vendor points" does.
You can't use this column to import the fees.
I am waiting on a improvement of the import system in order to be able to catch some new columns and make the import of some HikaMarket data during the HikaShop import.
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.