One question about a group of people. You pay in Monero, which needs no name and no card, and the answer never says who asked.
Reading the pool.
The pool keeps counts, not answers. A group smaller than five is never described, and every number that goes out is rounded the same way, so nobody can use the pool as a ruler to count you. Naming a payout address is optional and is the only thing here that could be joined to a chain.
Facts in the pool come from the account home, where they sit in your data profile and can be taken back at any time: Open your account home. Hand-ins are tied to that account, and being in the pool is what earns a share of what buyers pay.
A note is a share the pool signed without ever seeing it. It belongs to whoever holds it, so the pool cannot tell which hand-in it came from. Your browser checks the signature before keeping it, and nothing leaves until you name an address.
This is the whole note. Whoever holds it can spend it, so keep it somewhere safe if you want it to survive this browser.
A hand-in gave you a number and a secret, shown once. Put every answer back exactly as you handed it in: the pool kept counts, so it cannot look them up for you.