I guess it is used with 2 a bit distinct meanings here:
1) someone who has used CW software for a while, so was not "changing the side" before. I have 2 observations for such "loyal" users: they normally say they are "loyal" right before they say they are leaving; the number of years they claim they are "loyal" is reverse proportional to the time they have (current) forum account...
2) someone who has continuously payed for CW software for a while. This category use the term to give some weight to following request(s).
In both cases, since the majority of this forum members is... let say not kids... periods under 3-5 years are not sufficient for the "loyalty"
Since CW account is bound to the forum account for quite some time already, there are less people which claim they are loyal "type 2". Because if someone has 1 month account it is too obvious person has not used the latest Sonar version more then a month