So while it may be cheap it's still a cost. Is there a file size limit? What if I statically host CoolLinuxISOs.com? Surely that could end up costly or is it limited in some not identified way? What about handling major traffic from, say, if my website went to the front page of Reddit.com or any other popular website? Can it scale out and handle traffic spikes or even constant traffic?

I get this is more for small / tiny sites and it's really cool I just want to make sure I understand the costs associated.