Whenever I do the zombie event, I notice that regular zombies are worth $750, and headcrabs give like $7.

Can we tune up the headcrab value to $250 or something? Its not worth for anybody to kill them, and it leaves a lot of black headcrabs putting my hp to 1 during my bhop.

There should at least be a reward for dealing with something annoying.
Getting rid of the annoyance isn't a very satisfying reward, it makes it have no purpose other than to be annoying.

You still have to invest at least some time into it.

The reward for killing a regular zombie is barely, if even, worth it already. Getting $7 from a headcrab makes it only worth to kill them to get rid of the inconvenience. To have no reward for something that's also annoying to do is to have something that shouldn't be in the game. Again, its a really semantic and nit-picky request, but it's nice to have that little bit of QOL.