As a member of the forum and you're not growing in knowledge of the main purpose for which the forum was created for then it's a waste of time and energy for you. The forum is not just about earnings so if your growth in the forum is focused in ranks you are basically not growing.
Without knowledge and good posts, you can not rank up.
If you rank up with your good posts, you deserve to be hired by campaign managers and companies because your good posts will help their advertisement through signature better.
Knowledge, rank and income exist and grow together and you will have better income when your rank is higher. Ranking up when your brain is empty is impossible and even you rank up without knowledge, managers will not hire you when checking your posts and see only no quality posts.