Singular is expected. Attributive nouns (nouns that come before other nouns to modify them) are usually singular in English. There are some exceptions, such as "arms race" or "sports hall", but these are very much in the minority.
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AnonymousWhich form is correct:coupon countORcouponS countAre you using "count" here as a noun or a verb? If you mean something like "Coupons have significance" then it would be "Coupons count."
khoffAre you using "count" here as a noun or a verb?I believe that the last sentence of the post shows that the former is meant.