"Are you a brokerage?" is one of the most common questions agents ask us, usually with one worry behind it. So, plainly: your client stays your client. RealOpen never represents buyers or sellers, there are no RealOpen agents for your client to switch to, and the purchase closes as a standard cash deal with your name on it.
RealOpen does hold a real estate brokerage license, for two unglamorous reasons: it lets us legally receive referral fees, and it gets us MLS data feeds so the listings on this site are real. It does not mean we represent anyone. There are no RealOpen agents, and there will never be a RealOpen agent competing for your client. When you bring the client, we take nothing from your commission; when we refer a buyer to you, a standard referral fee applies and is agreed up front.
What RealOpen does is the part you couldn't do anyway: verify the buyer's onchain funds, issue a proof of funds the listing side can independently check, and deliver converted dollars to escrow on schedule. The ten-minute version of working a deal like this is at your buyer wants to pay with bitcoin.