One simple way to give back to your followers is through promo codes or other special sales. You can offer your Instagram followers a special promo code which can only be seen by those who are following the company through the social media platform. Or, you can inform your followers online, about sales that are going to take place before the general public learns about the offers.
Doing these simple but personal things for your loyal followers is a great way to thank them for their business. You were going to host the sale anyway, why not inform the online followers a few hours or even days before, so they can take advantage of the items they want to buy?
Or, why not give them certain online promo codes, which can only be used by those who follow them through certain social media platforms? When you do this, you give people an incentive to continue to follow you and to check in on social media platforms regularly.