That was a flaw with early experiments, but we've since worked it out. With our updated business model, we only provide you with one monkey and typewriter in this universe. At the same time, in each of infinite parallel universes, the parallel 'we' give the parallel 'you' a monkey and typewriter as well. Each typewriter is equipped with a lovingly crafted and painstakingly entangled transceiver to broadcast and monitor an infinity of random typing, listening and waiting for your answer to ephemerally cross its antenna.
Great news! It's statistically certain that one of the infinite monkeys has already typed the answer you seek. However, due to information propagation delays, it may take between zero and infinite time to reach your universe. Rest assured, though, it's on its way. While you wait, please enjoy your monkey. And typewriter.
Thank you for your business!