We read through your reply and would like to explain points which I hope will elaborate the points for you.
1. The premium 123RF stocks at DesignBold are curated from premium stock provider 123RF. (Images with 123 RF Watermarks). All the 123RF images carry licensing and copyright costs that are paid for via coins.
So, no venture can provide you with Free coins forever to freely use premium stocks. Even in Canva, which is a great product, you have to pay $1 for each of the premium images or icons you use. If you want extended use of the premium images, then you would need to pay $10 per premium image or icon. Hence, I am not sure regarding the perpetual free premium images or credits you are referring to.
At DesignBold also you will be currently paying 0.8 to 1 $ for standard use of any of the premium 123RF stocks, which is the prevalent market rate.
So, to summarise again, it is not possible (at present) for a design SAAS venture to provide free premium stocks forever for one-time pay. It is not feasible commercially and also in terms of image license costs.
(The AppSumo deal page never mentioned that there are free forever credits to buy premium 123RF Stocks)
2. In your AppSumo deal, you get access to the entire range of free pro tools. (Including Premium Images of DB Folder)
Free Premium Images:
In your AppSumo account, you get free access to 8000 + premium images in DB PREMIUM FOLDER. (You will find the folder at the left sidebar in the design edit area)
These are premium images/stocks, that DB has bought with extended license for its users. So that users can use these premium stocks without paying any price (completely free).
You can use any of the Premium Stocks in the DB Premium Folder as many times you want and you would not be charged. (Free of cost)
To conclude the long answer, providing free coins for always to freely use premium stocks from 123RF is not possible due to licensing and copyright costs.
We hope that now you are more clear regarding the benefits you have in your AppSumo Pro Account.
You also now know that you have free access to Premium Stocks in the DB Premium folder always without the need to pay for those images.
In case, you would need further inputs regarding your AppSumo benefits, do add to the comments below. You can also contact us at our Chat Support.
We would be happy to clarify the doubts you may have so that you can use your AppSumo pro account in the best possible way.
This article link will guide you about how to use images at DesignBold
N.B: Whenever you download any design with premium images (from 123RF & not covered under AppSumo deal),
You will be displayed the pop-up, exactly mentioning the costs of the images and also the type of license you are paying for.
(You will find the details with screenshots at the link I just shared above)