I agree with this, there is many Legendary members who did not get not even one merit so far, and some campaigns requiring at least 5 merits, which is too low in my opinion.
I think any account which hasn't earned any merit in the last 12 months should lost a possibility to wear a signature. Perhaps it would contribute to a more quality posting on the forum.
Any good campaign manager would still check the post quality, including the Merited posts. If the post isn't worth it, it shouldn't be counted as merited to qualify for the campaign.
How can a campaign manager judge that a comment worth a Merit or isn't if it is a subjective assessment system?