Charging to host the plugins on daily basis is not a fair enough step especially when there is no sales on daily basis and majority of vendors are having the same concern that their all plugins and themes are not sold on daily basis so I strongly believe that daily charges to host the plugins are not good.
On the top , customers are redirected to venders page when they are supposed to buy the plugin and there is no facility provided by nopcommerce team to manage the sales of plugins and majority of all venders have invested to build / develop their own shop page to have the sales of their plugins. so this also going to create a negative thoughts in customers mind that they are trying to buy something from nopcommerce market place but payment processing is done at other place. So per day charge for hosting only is not recommended.
Rather, nopcommerce team have to think for EITHER one time charge per year basis to host the plugins OR commission to be charged per sales for plugins like Envato or Code Canyon and its fair too.
As per current plan venders needs to pay on daily basis where there is no guarantee of sales on daily basis and venders may have to pay from their pocket regardless there is an income or not.
If nopcommerce will go to implement commission per sales from their on sales site or market place then it will help to venders and more income they will have as commission and venders will also have revenue and they have to pay commission on the basis of total sales , so it will be a win win situation for nopcommerce and venders both and customers will have a great level of user experience and they can do everything from a single site only....
I highly recommend to implement nopcommerce own market place from where all products can be sold and they can charge their commission per sales and this way venders wont have any burden to pay for hosing the items only.
I hope current plan of per day charge will change soon by nopcommerce to grow more along with all their venders.