ポストカードを作ってみました。
こちらは無料配布予定ですので、お近く通ったらぜひぜひもらってくださいな。

I tried making a postcard.
I'm planning to give these out for free so if this goes through, by all means please take one.

When they ask people to "take one" they're referring to the physical product that will be (hopefully) available at Comiket.