No, it's already going ...
this is contrary to what you want. Steempress publishes from outside to Steemit, so the creators in Wordpress create accounts in steem to take advantage of their post, that attracts people. Instagram grew because people shared their photos of the IG to Facebook and Facebook users wondered what Instagram was about. What a sense it is to bring the instagram content to Steemit if everyone here already knows Instagram. What you have to do is create the content in Steem and share it outside, in those networks as an instagram to attract users and see that great content is produced here.
This dapp has no benefit for Steem and yes for Instagram, better pay them Zukemberg