if you think your sponsor is chewing ya simply change and compare data.
also try building free sites with a 4free sponsor like weg cash etc, as it is you are only making 1 sign a week you should easily be able to match that with 4free commissions.
bottom line give it another try with a new sponsor in addition to that construct some freesites and submit daily to sites like the greenguy, wetplace, dangerdave etc. i have found this traffic to do a little better then tgp traffic.
hope that helped a bit
edit
also i re-checked your site and noticed you only had to out going links to sponsor most tgps allow 3 so i would add another on smack bam in the middle
