Is it worth using the herd mining option even if you can only use cpu?
CPU mining in general isn't recommended but you can still get a few thousand dogecoins a day (mining 24h) with a regular CPU if you're mining in a pool. Completely depends on your CPU of course.
I think it's pretty funny that a satirical coin is gaining so much traction in a short time. The name is a joke of course, but it's still based on the same code as those it's making fun of.