I tend to think of Lacroix's job at CERK as more of a hobby than anything—and that he prefers to treat the jobs Nick takes as being hobbies as well (which I am equally sure is not Nick's point of view).

I suspect that, to Janette, owning the Raven is by way of being a sort of community service. She surely finds the obligations laid on her by mortal society, such as taxes, to be irksome; but the club allows her to offer refuge to other denizens of the night, both vampire and mortal. The working of some maternal instinct, perhaps, given that (aside from the Baroness) she has not brought anyone across that we know of, yet does sometimes seem to betray a measure of regret in that regard.