I don't believe they claim to be these things, so how can it be a conflict? Frankly, if they didn't do the sponsored videos, it would be a bad career and financial move for them. If this is their career that they are relying on to support their growing family, why would they want to decline these offers? I agree with you that they will promote any place that's willing to pay, but I guess I don't see what's wrong with that. They are still showcasing things about the destination people wouldn't have otherwise known, and the content can still be used by a person to determine if its the right vacation destination for them.
This topic reminds me of hipsters who fret when their favorite band is played on mainstream radio because it's "selling out". Like, isn't that the end goal? To make money and receive attention? If not, then why do it at all