Blogger's Dilemma

There seem to be many definitions of 'Blogger's Dilemma'. A quick web search yields a lot of results. My definition of Blogger's dilemma goes like this :

"When a Blogger knows he has a bright idea, an idea which he could actually use in future and make money (even an idea which he believes has the slightest chance of blossoming into something useful) , would he go ahead and post it ? "

Can the blogger actually use his blog entry to prove his patent claims in future ?

A more basic question is, if all the posts on the Blogosphere are useless pieces according to the person who posts it, what on earth do people reading reading tens of blogs everyday hope to gain in life ?
(Of course, this would not hold true for blogs with entertainment/news/propaganda content.)