Freemarket opened last weekend, The Copenhagen Post $4.
Customers register online, and pay a monthly fee of about $3.39. Next, they select a list of products and pick them up free of charge in-store, $4.
The fee allows customers 1o products a month, plus discounts and gift certificates at other retailers, according to the paper.
The customers have to complete reviews by a deadline or else they are charged a fee.
Here are some of the products the retailer advertises on its $4.
There was a line to get in when the store opened this weekend.
Inside, a worker helps customers.
Here's what the box you receive looks like. It's filled with the items of your choosing.
The BBC $4 that so-called "tryvertising," where customers test products for free and review them, has existed for quite some time.
"Experienced consumers switch off or even get angry about the commercials, ads, banners and pop-ups foisted on them," BBC writes, citing $4. "'Tryvertising' is an innovative way to reach them."