Ask them. Say something non-confrontational like "hey I saw this on this website, it made me feel a bit hesitant. can you offer me any reassurance?"
Then hear their response, and then sleep on it for a few days, and then trust your gut.
If their response was great and made you feel reassured without any second guesses, great. If you still have pause, trust your gut.
If you are seeing red flags, skip it. Don't take a risk on joining up with someone when you're seeing red flags from day one. I've done so before, and always regretted it.