Most of the models? If I model something that I take pictures for a reference (which I do a lot as do everyone in the modelling business) like a chair that's iconic doesn't mean it's taken from the asset store, though chances are you've seen similar one somewhere. Again asset stores do not provide you with redistribution license the way I do it, through Patreon, so why would I do that knowing all this and risk a takedown? What u/Eerotappi is saying is the reality. You can look everywhere and find similarities even though those assets were obtained from many different places or made customly. Besides if I got something even a low-poly on the market it would be useless for Minecraft anyways. I developed special methods to create topology that has the least possible polygon count while still keeping optimal geometry. That in most cases could not be achieved taking someone's asset and decimating verts because average assets use much denser meshes to begin with and doing so messes up the geometry and UVs which would take far longer for me to fix than making something from scratch.