Funny story - I used to live somewhere very central in London.
I noticed there was this one spot that always had something there.
After living there for about 2 years I knew it was THE SPOT.
So when it was my turn to move out, I had to get rid of all my furniture and thought I'd give it a go: over the course of a day I got rid of two 3x3 ikea kallax, a 2m cupboard and a tv amongst other stuff. An old woman even tried to tell me off for illegal flytipping but the ONLY time anything lasted more than 30 mins was when a guy found the 2m cupboard and was organising a car to come pick it up for him. And he stood there protecting his quarry for about 1 hr (I could watch the spot from my balcony)
My fav was actually helping to carry one of the kallax shelves about 400m to the other guy's house with him.
That's heavily locale dependent advice. This is not something you can do without it getting reported and treated as trash everywhere, and in many places you'll just anger your neighbours and inconvenience the municipal trash department.
Since it's free, people probably don't think they are missing out as they can get that "free" at some point later on. You take things more seriously when you pay for them.
this is the way. put it on Craigslist "Free" and FB Marketplace, drop specific coordinates / locations / picture.
"first come, first served", then walk away. Like one time I put the furniture and other stuff at the end of the driveway and then took a shower, and when I went back to look maybe 30 min later it was gone. deleted the posts and got on with life.