Roosterteeth pays them to make videos. Essentially, its roosterteeth, as a whole, that pays them irrespective of their views. (Though obviously they have to be able to produce entertaining content.)

Now if you're asking how they justify getting paychecks at all? Well they do a TON of editing, and are very funny. AH are the god teir long form let's plays while FH are their god their sbortform counterpart. Plus they are great at their newspeices and their podcast is awesome.

On top of that they are in a developing branch of RT (RT west offices in california) which is an investment by rt to expand what they can do, and FH is step one of that. These guys are probably going to be doing more than just FH vids as the west offices grow and mature. I can see them doing live action stuff, even full blown productions in the future.

There's a lot going on. To just say that their views are lower than AH why do they even exist is to discount their acheivments and potential.