Well, a lot has changed in two years. Maybe we'll have better luck. I doubt they would jump on board right away, but if we can get a standardized protocol agreed to by the developer community and a few sites (like maybe SteemPeak.com) to start the integration - they may be willing to accept and merge a pull request if a community dev does the work.
(It will be an up-hill battle, but there is a good chance we can make it work.)
I think getting Steem Dapps to use it would be a better/easier idea. That way they get more funds to reward there users/take less money out of posts this letting users earn more.