Yes, I do. I'm not a "professional," but I do sell a bit here and there these days, and aspire to maybe one day get up the nerve to try to have a showing or something. Like others, the "main" reason I watermark is just a little advertising, and mine is just a simple font with the copyright symbol, the year and my name. I try to make it as unobtrusive to the photo as possible.
Some people just find them distracting, period. Fortunately for me, those people are not in charge of MY photos.
But I do also do it for a security reasons, to a VERY slight degree, and with the acknowledgement that anyone who wants to steal MY stuff is beyond hard up. :lmao:
When my boys were in scouts, our Scoutmaster *required* a lock on every trunk that the boys took to summer camp (a lock with TWO keys; one for the boy, and one for the scoutmaster, so when the boy LOST his, he could still get into the trunk).
Anyway...he also asked the boys why they thought he required the locks, and the answer was always something along the line, of "DUH, to keep people from stealing our stuff!"
The Scoutmaster would then tell them that the lock wasn't REALLY for that, as dishonest people who want your stuff will pretty easily find their way in to a footlocker, even if it's locked.
The lock, he said, was simply to KEEP Honest Scouts Honest.
And THAT is why I watermark for security reasons--NOT to keep those with no sense of ethics from taking it, but so that those who are inclined to be honest in the first place KNOW that it is not some "random picture from the internet" that is just free for the taking.