It is worth trying.It's worth trying, but honestly I already have quite a bit of stuff outside, and zero interest. The occasional bee (3 today) on that bit of old comb.
Scouting in my backyard slowed some and I remembered this trick from last year.
So I climbed under the porch and pulled some of these boxes out even though bees found them already.
Yes - it works. For sure drags many more bees this way.
Just the volume of the wax/propolis scent when hit by sun is so heavy so that the plume spreads around much wider - more bees catch the sniff of it.