This reputable survey company only opens up their survey panel to new panelists periodically...that is, their survey panel is closed to new members a lot of the time.
Why? Pinecone Research is a highly reputable survey company as they pay on time, pay well, and their surveys are enjoyable to take. They also pay via PayPal.
Finding a Pinecone Research link can be tricky, but you can find them on this Pinecone Research Banner Join page.
Joining Pinecone Research is free, just as any legitimate online survey panel will always be.