Your paying customers are still going to have to post their articles to different sites regardless of whether you support it or not. But you could make it easier for them. I would tell them:
"Medium cut off access so you have to go there directly to post. We've formatted your post for Medium - cut this and paste it to Medium here: [link_to_create_new_post_on_medium]."
Publishing to multiple platforms via a single click is nice, but the most painful part about publishing to multiple platforms is formatting the posts so they look good everywhere you post.
"Medium cut off access so you have to go there directly to post. We've formatted your post for Medium - cut this and paste it to Medium here: [link_to_create_new_post_on_medium]."
Publishing to multiple platforms via a single click is nice, but the most painful part about publishing to multiple platforms is formatting the posts so they look good everywhere you post.