>I suspect, for instance, that some companies would see the cost of buying a
>subscriber account as cheap compared to the cost of getting an ad placed
>legitimately on LWN.
Cost of ads on LWN: 10000 views for $1. Views before a post is marked as spam (if normal users can click the "spam" button): probably 10, maybe 100 max. Say you get away with 3 before your account is canceled; that's still a whole lot less effective than just paying for advertisement.