Oh Lord...., been doing both for 15 years or so.
Had NEVER heard of either being done. In print or on the Web.
Took several years before I had the gutts to post anything or discuss what I did.
I finally made a post with pics on an outdoor forum (don't remember which) and was ridiculed to the max.
Not saying I " invented" fake scrapes or rubbing poles but good chance I did.
I made this brackett about 18 years ago. Set it up in a remote bedding area no one but me was allowed.
Had to get there by canoe.
Hmmm, thought i had a picture but cant find it. It was a bracket made of angle iron bolted to a tree. Was ugly/ loud as hell but damned if the bucks didn't make a good scrape under it.
this one I made about about 10/ 12 years ago and a good buddy of mine was gonna help me patent it. He spun his wheels and I lost interest.
Adjustable in branch height and solid.
Somehow, someone got a pic, and several years ago, I started seeing similar designs for sale.
As for rub trees, same. Found a cedar fence post in an old fence line in South Dakota while coyote hunting one winter years ago that was almost rubbed in 1/2 from bucks rubbing it. Asked the landowner if i could dig it up and take it. " Sure". I did, took it back to Mn, dug it in a major travel route and it never got touched. Lol.
But I new I could/ would make this technique work. Played around with it for several years untill I found the right tree species and BAMMMM,
Posted it on a forum and got criticized AGAIN for being stupid and a few years later...., it's all the rage. Lol.
So, in a nutshell, I as of (now) can confidently say, both of these techniques so common nowdays i started by flapping my mouth on outdoor forums years ago.
Believe it or not.