Some Questions About Images and Licences

Hello everyone, there are some questions that i would like to hear your opinions.

Firstly, lets say i am designing car wash flyer or something related with cars. Envato’s help pages and licence guideline ( https://help.author.envato.com/hc/en-us/articles/360000472183#assets-main-download ) says " To be able to use an asset in your main download (the ZIP that gets distributed to the buyers), you must have the rights to resell the asset. Additionally, always read the license of the asset you’re using carefully to make sure there’s nothing else that might prohibit you from distributing the asset. For example, check whether the asset can be distributed in any format, or whether it needs to be incorporated into your item such that it cannot be extracted by end users on a stand-alone basis."

So from this, i understand if photo’s owner gives us to disturbing permission we can use these assets on our main download file and disturb them every way.

And the other side of the topic, i would like to show example like “Unsplash’s policy” about this.
“…More precisely, Unsplash grants you an irrevocable, nonexclusive, worldwide copyright license to download, copy, modify, distribute, perform, and use photos from Unsplash for free, including for commercial purposes, without permission from or attributing the photographer or Unsplash…”
( https://unsplash.com/license )

I know there are some rules like no human face, brand logo etc. but other than that i think we should be able to use these images on our main downloads zip. What are your thoughts about that?
And second question is, i see some designers use this kinda images bottles cars or some other objects
what are the criterias for their use and approval?

This was confusing me lately. I would be really happy if anyone explains to me :slight_smile:
Thanks

Is there any experienced member who can help?