Anyone using the affiliate program built into WHMCS? How is it working for you? What are the advantages/disadvantages over going with something like Commision Junction?

CJ will get you much broader exposure, but it costs to join.

CJ will get you much broader exposure, but it costs to join.

Any idea how much?

I don't have personal experience with them, but read elsewhere that it's upwards of $2000 to join, plus percentages and minimums thereafter.

Yikes. OK, thanks.

With CJ, they take your sales history into consideration as well and won't even take you on if they don't feel they can make enough money off of you.

CJ is definitely for well established companies IMO. Although the affiliate system in WHMCS isn't much, it's growing and it does what it needs to. There is always the option of a custom one which could easily be integrated with WHMCS using a custom (hidden) client field.