A portion of my converting subids always show up as "test" in Cake.

I'm definitely not writing "test" in my tracking links.
Any idea what's going on here?
I'm using iMobitrax.
It could be the traffic source testing your links or another affliate that is spying on your LPs
What kind of data are you usually sending into subid2?
Could also be that you used a link in the past with s2=test and someone has cached/recorded that link, and are now testing it periodically, i.e. spying.
These are converting subIDs, so I highly doubt there that many affiliates viewed my lander and completed the entire conversion flow. Generating up to $300 daily revenue from these "test" clicks.
And I'm sending unique iMobitrax clickIDs.
Oh wow that's weird. Any offer rotation happening in iMobiTrax? Are the rest of the clicks passing clickIDs fine?
Yup everything else is passing fine.
Splitting traffic between the same offers on different networks, both on Cake.
Just to confirm, is it that:
a) all of the clicks network A are coming up with test, all at network B are fine
b) some of the clicks come up as test at both network A and network B
Does IP matching confirm that the 'test' clicks came through your tracker? If so then it must be iMobiTrax playing up... or your server. Not sure how. If someone was using your affiliate link because they are a moron then presumably you would have a lack of those 'test' click IPs in iMobiTrax.