When promoting on social media try as much as practical to pitch multiple product categories. From what I see greeting cards are too often forgotten by newsagents in promoting their businesses.
Displays benefit from including cards as there are cards for every occasion. This lack of engagement in marketing could be a factor in newsagents seeing declining card sales while others are seeing growth.
The more (relevant) product categories you include in a marketing pitch the more likely you are differentiating your business from competitors.