Charging independent drivers a yearly fee may certainly be a point on the bargaining table.
$500 ----If you work 250 days a year that is $2.00 a day.
When you have a regulated service like the taxi stand at the airport that requires taxi drivers to wait their turn in line overseen by the dispatcher some drivers will have long waits for a fare and may only be able to do 2, maybe 3, pickups a day while spending wasted hours of off time waiting in line for their turn.
When an independent driver comes in a few times a day for their 'prior arranged' pickups, has no wasted hours waiting in line at the airport so can carry other fares all day, pays no association dues, and stands at the front of the line with a sign for "The XXX Party" the regulated Association drivers certainly take notice.
The organized Taxi drivers constitute a strong political power and a cohesive voting bloc in STT, strong enough to seat or unseat our $85K/yr legislators, surely affect our Gubernatorial elections, and rarely take credit cards for payment.

I always recommend Kevin because he does a great job and I have known him and his family since he was in school - he is a good friend, a hard working entrepreneur and a fine example for the Community.