The exec behind the Nike and Petco apps reveals why Chick-fil-A's chicken sandwich giveaways are a brilliant strategy

<img border="0" alt="Chick-fil-A" class="img-responsive imported-news-entry-img" width="1575" height="1182" src="https://images.markets.businessinsider.com/image/5e596a19fee23d1f3e4ab307-1575/ap365709758660.jpg" /><span class="source">Mark Lennihan / AP Images<!– sh_cad_1 –>
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<li>Bob Bennett was the general manager and…