So I always wonder why people buy these? I figure the main reason is that they have had a bad experience with a rocker advertised as a "porch" or "outdoor" rocker but which wasn't made of a weatherproof wood, and they figured the only answer was to get plastic rockers the next time. Shame on the furniture industry for that - of course there are weatherproof woods, like teak and brazilian cherry, but stores are always acting like you can have it all for nothing - $99 for a porch rocker! So people end up with junk, and two years later they come back and buy plastic out of desperation.
The other theory is that people are buying these awful rockers in order to be environmentally correct. Now, compared with piece of junk rockers that rot and end up in a landfill after two years, this is very environmentally correct. But these are so nasty and uncomfortable, my suspicion is that a lot of them are in a landfill in a few years themselves. But if you buy a high quality rocking chair, then it lasts forever, and that seems the most environmentally friendly at all.