Many TEs are fun to use, have great bonus and prize structures, and simply have a great layout.
One thing matters to me, though...
Conversions...and I believe the starter of this thread inquired about it.
With that said I have to say that Traffic Ad Bar gives me acceptable conversion rates.
MUCH better than even some of the TEs that boast huge membership bases.
Not only do I receive more opt ins (consistently) from TAB, but I also
receive more unique hits there. Many other TEs I've used show my
ads to a much lower percentage of unique visitors.
In Traffic Ad Bar I can rest assured that fresh new eyes will
be seeing my ads daily.