Perhaps true in lesswrong’s case (is it still under active development then?). You’ll have to suffer me moving the goalposts again, because what I was getting at was websites that serve fairly static content. If lesswrong is actively developed and has taken a lot of effort to build, then take a random wordpress page instead.
No the aliens don’t pay for developer time, for the same reason they don’t pay the journalists.
Because I used to work for/with companies whose business model was mostly free access covered by ads. Costs of keeping those sites running were substantial and proportional to amount of visitors.