You know, you learn something new every day. For some reason, I have always thought the bed was the traditional spot to leave a money tip for Housekeeping and I assumed the table, regardless of whether it's the table by the door or wherever it is situated, is for personal belongings for the guest.
I guess I just figured that the table would not be a place a housekeeper would "tidy" up as again, it would likely include personal effects of the guest such as souvenirs or receipts or in my case, I keep my medications and vitamins there. But a bed is something you know the housekeeper will tidy up, so I have always left my tips there.
I have, in more recent years ordered cute little mousekeeping envelopes people sell on Etsy as well, and left them on the bed.
But in general, I would never leave anything such as money or wallets or identification, ect. anywhere in the room other than the safe. If it's too valuable, lock it up. I guess, after reading the whole thread, I do see a certain logic with leaving a tip on the table as well, but I like to use the table for other things and think it's better to leave it on the bed in an envelope.
You would think, in this day and age, with so many payments being digital, such as paypal or google/apple pay, ect. they would have come up with some sort of way to tip Housekeeping digitally. I mean, so many things have changed that way, we even enter our rooms digitally, so why not that? And I understand it is different people everyday who turn down the room but you would think if anyone could come up with a digital way to do it, it would be Disney. Like an option at check-in to set aside a certain amount of money for Housekeeping that they then see to it goes to the proper staff who clean your room each day.