The post must not be useful to the meriter before they give merits to it, if it was to be that way then merit sources may find it very difficult to give merits to newbies, since there's every chance anything posted by them is already known by the merit sources since they are high ranked members and have been involved with bitcoin for a longer period or duration of time.

Many merit sources have stated before that they give out merits to even posts they do not even agree with. If it's useful for some and it's a good post, it "could" get merits.