He, and a series of predecessors with the same schtick, have been regulars here for years. You can usually find him on Duval between Greene (the intersection in this pic) and Caroline (next block in the direction ahead of the camera). They've always used some variant of this hand made sign.
Of course, they don't buy custom signs from me. The company I work for has made about half the signs on Duval over the last 56 years, though I've been with them for only the last 3 1/2.
LOL..... in the same vein, I once saw a busker at the beach when visiting LA. He was awful... had a sign around his neck "For a few dollars, I'll stop singing"
love these HONEST guys