This is very ironic for you. You advised people to avoid joining signature campaigns, but here you are. And I don't think not having a signature campaign would really give you a chance of receiving a number of merits. I mean it has nothing to do with it, simply it depends on the user. If that user can cope up to the required number of posts as well as having quality posts, then that's good. For example you have 20 posts requirement for that signature campaign, you could plan for a schedule like 5 posts per day. Making 5 quality post for the day is more than enough time to do so.