I agree, I think the ability to edit posts after 7 days is a good step forward and will solve a number of problems. Although there is a worry excessive use of the feature could cause bloat on the blockchain because an edit is handled as a re-author of the post.

The cost of running a Witness server is going to vary on the specification of the server you run, the advised spec if 64gb Ram and 500gb ssd minimum which would cost in the region of $100 per month.

Thank for calling in and leaving a comment.