It seems to me that you are assigning a motive. I, personally, think it is highly interesting to see the comments they get.
I like to find conservative blogs easily, so finding them here on FR, makes sense to me.
I suppose if it is a matter of bandwidth, the owner could charge them a fee.
But assuming that they are being nefarious for posting blogs here, seems trivial to me.
WE are the media. I remember back in the day when all we had was Chris Matthews on Fox, (hello- yes- CHRIS MATTHEWS!!!) Freepers with boots on the ground, at major events, with interesting points of view, was where I got all of my news and I was thankful for what Freepers where posting.
If you write something that you want us to read, then post it at freerepublic.