The issue of whether or not you can use in your renders for microstock elements you bought at places like Turbosquid comes up now and then. It can be complicated. The last I knew, Shutterstock will not accept any renders of architectural interiors, for the reasons mentioned in the thread you linked to. However they will accept some other kinds of CG renders.

It is my experience that some elements, such as obj meshes, textures, etc can be used legally and can be accepted at most microstock agencies, but it depends on what license you get from the vendor. It can be hard to know since most such licenses are written in bad legalese. But it is my understanding that most vendors do not grant a license to use elements in stock which you sell. E.g. my reading of Turbosquid's license is that they do not allow this. However some vendors do grant such a license. You just have to read the license and try to figure out what rights it grants you.

Yeah, I sometimes use 3D models in my renders which I've bought online. Turbosquid don't allow this under any of their licenses, which is why I don't buy stuff from there for use.in my work. CG Trader do allow this under their general license, and I'm sure there's more.

So on top of any rules the sites you're submitting to much have, just go through the license terms of the site to make sure you're not going to get in trouble.

Yeah, I sometimes use 3D models in my renders which I've bought online. Turbosquid don't allow this under any of their licenses, which is why I don't buy stuff from there for use.in my work. CG Trader do allow this under their general license, and I'm sure there's more.

Evermotion also allows.

Shutterstock has returned to accept interior renders, with certain conditions.
The point is to what extent it is necessary to modify the scenes. And above all what problems you can have with Shutterstock, Fotolia, etc. We already know that they do not doubt if they have to close the account to a contributor.

In addition, Evermotion allows to sell the render of their scenes in microstock, but in the examples of the forum of adobe we see screenshots of Mac OS X, with logos of applications, etc. And they are not licensed for that.