Nothing to be surprised with, but a $20 budget won't take you anywhere. A $200 will have some effect.

I would, however, try to squeeze out the most value I can out of the $20 budget and spend it on well-located text-links on not crowded with ads freelance/webmaster web sites.

Try looking for a freelance marketplace (your target audience #1) - not all marketplaces offer forums for their members. Something like ScriptLance or DevLance, although it may cost you more. OR look for directories and webmaster-related web sites.

Good luck,