Pokemon product at the counter displayed professionally and competitively priced drives impulse purchases and drives return traffic to the business. Also, it pitches authentic Pokemon product. With some discount variety stores selling knock-off products, being proud about selling authentic products is important.
Not just discount stores sell knock offs…
http://press-start.com.au/news/nintendo/2017/02/08/australia-post-allegedly-selling-fake-pokemon-cards/