Unless they give back the edit and delete buttons, people will be forced to repost old content just to fix broken links and outdated information.

Reposting could be reduced if a tip button is added. If a user can post something once (and keep it updated, correct, and working), and continue to earn from it via tips, there will be no need for reposts. These old posts would become the showpiece of their blog, and reposting would just diminish their value.

If you want to reduce the incentive to repost, ask for the addition of a tip button and the ability to maintain old posts.