In support of the upcoming deprecation of Hashtag Search via the Instagram Platform API, Instagram announced the release of similar functionality for the Instagram Graph API. The new Graph API feature will still provide businesses the same basic functionality, but Instagram is imposing limitations.
Sustaining an effective engagement campaign can take a surprising amount of work. You could limit yourself to following the leads from the data you collect, but following without interacting first will get you a very low follow-back ratio. More importantly, if you follow and then forget people, they may follow back, but they’ll soon forget you. A high number of followers who don’t reply to, mention or retweet your account are of no value. True engagement is long-term and repetitive.