From VARbuzz, initially quoting the Swanepoel Report –

When real estate agents take on second and third jobs and decide not to disclose that fact to their client, it raises questions concerning their level of commitment and service.

Hard to argue, isn’t it? I mean, if the pilot on my flight was a part-time freelance writer, I’d kinda want to know that he may spend some of his cockpit time on his laptop.

Pretty much. And Lenn hits the nail on the head in the comments – if brokers didn’t hold licenses of part-time Realtors, they’d have nowhere to go.