Are you talking about sMerits (sendable)? If so then obviously you won't be able to merit posts since you have used it all. Currently, the only way to gain sMerits is when a user merits your post(s), half of it will be sendable.
I'm guessing that you haven't read this thread yet?
https://bitcointalk.org/index.php?topic=2818350.0Yup did not read it Just got back this week and to my surprise this merit appears.