Another concern is the growth and profit expectations that will come with more funding (beyond current expectations) and the lack of leverage they will have if they can raise more.

I'm not sure there are many companies such a scenario has worked out well for, but I'd love to dig into examples if people have any. And working out well can mean different things for investors vs employees vs customers vs free users vs readers. I would expect the interests to become less aligned the more investment they take on without being profitable (see Evernote's recent moves and resulting user backlash).