An example, my Averett team had two walk-ons last season because I lost two battles that went down to the last minute. I wasn't planning on two walkons. It just happened.
If you do the "Walkons count for half cash" thing I would actually want to slightly improve the Walkons. Not to the level of even decent recruits, but get rid of the 5 athleticism, 10 speed, ten defense sorts. Give them something that's remotely usable, for example, a forty or fifty rebounding, or whatever, while still not elevating them to normal recruits in general. Still, making a "walk on success story" possible might be entertaining.