I get why people do it, it's an easy path to fast money, but why would you want customers landing on pages that read like dog droppings?
Money valued over content, don't care about customer or impression you make, only money.
As mentioned above the examples posted came right off the spinner. They did not go through a human editor.
Stuff that is actually used (after touchups) looks much much better (not only in terms of uniqueness, but in quality).
The spinner is basically a tool. Sorts of the computer that replaced the typewriter, which replaced the pen and paper. It can be used to help the writer.
Wouldn't you prefer to be able to leverage all that unique content in the end instead of getting it devalued along with all the spun content?
Caution is always needed.
However, any story that hits the ap/reuters news desk, gets a (human) spin and "Google News" shows them all. If the spinner (tool) is used 'smart', its edited material can come out better than hand+brain+heart written stuff.