It is hard a normal user to make connections to add STEEM or any crypto to exchanges. Exchange demand guaranteed tech support and some compensation from the core developers and foundation. Therefore, it needs effort from the higher order users. Moreover, I think setting up STEEM has a major technical difficulty: proof is regular outage of transfers from Poloniex and HitBTC. Therefore, it requires a great effort from top shots of Steemit or Steemit Inc. Only @zappl seems to be taking some actions.