A low coiner is anyone who has not gotten enough BTC, and an overwhelming majority of the world's population are either no coiners or low coiners and many low coiners don't even realize that they are low coiners because they happen to have a few coins. You, bittraffic, might be one of those smug low coiners who believe that they have enough when they do not.
I like this conceptual distinguishing the two investors. And from your definition, those who are earning from the forum are also classified as low coiners. Because many 99% are depending only on the forum campaigns earning and not really buying. And as you said the low coiners are more among the investors of bitcoin in the investment of bitcoin across the world. Many claim to have bitcoin but when you check it is just a fraction of it.