Question about free sites/blogs
 

I have noticed that a lot of the free sites that appear on link-dump sites are pretty much "throw-away" sites...a few pages and 2 or 3 galleries. They get listed and after a few days they fall off the list.

What if I had a free site that I put a bit more into, a more permanent site with lots of content..like a blog. Can a site like that be submitted repeatedly to link-dumps? Is it even worth it to submit a permanent site to them, or are throw-away sites the only way to go with that particular method of traffic generation?

Thanks for all the help I'm getting here...you folks rock!!

Can you give me some examples of each (URLs)?