That is not unique to the blogger posting area. Several majors threatened to sue (or did sue) and the excerpts are for when they are required.
Is there a reason you want to use Free Republic, supported by its members, to promote your blog, but not share the content?
If your desire is to get the word out, then feel welcome bring it to Free Republic. If you only want to use our site to promote yours, maybe you should find another place.
I donated, that’s how I support the site. I enjoy reading others posts and getting the news aggregated. I am also working on my own writing, aspiring to one day do that for a living, but not now. So I use my blog to measure interest. Period. I post other places and don’t have issues.