Does Facebook allow content creators (videos) to make first-party ads for sponsors?

I'm really not sure why you are asking this here as it is not really a legal question. As noted, perhaps the answer can be found within FB's...

I see no connection between the rights of those on the call with respect to using recorded content, which is what you are alluding to by noting 1...

How can I give a slogan and protected from the person that is receiving it ?

The only way you can protect it in this context is through contract law. You would have to enter into a non-disclosure / non-use agreement with...

What are my rights when it comes to a trademark issue with Airbnb?

As noted, there is no way for to know whether these are legit concerns or if they are bullying, which also happens. Before you take any further...

How close can I make the technical details of a 3D model to one ripped from a game and use it commercially?

In general, any creative expression will be covered by copyright law automatically. Then you register the work with the US Copyright Office so to...

This is confusing. You discuss amending class descriptions but then cite the TTAB rule for amending pleadings. Are you asking this because you...

The biggest issue you have is probably the trademark aspect. This will be seen as presenting a false association, sponsorship, endorsement or other...

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I think you are understanding the context correctly. You really have no leverage with Amazon here as they are merely responding to a complaint and...

Can I use artwork from this particular, unknown, site based on their terms and copyright policy? See situation below.

I would be very concerned about using work this way in a commercial context. I have seen many examples where people come to royalty free sites for...

Of course you can, but there might be some pitfalls under certain circumstances. For example, if the people are identifiable whether you use only...