It's like the misspellings in the phishing emails: it ensures only people who will fall for the trick will respond. If some model messaged you out of the blue, you're more likely to be suspicious or you feel that you're super attractive and a model might actually reach out to you. Either way you're more likely to not bite on the bait.
Yup. It's why the scams by phone are so irritating to most of us, as another example. It's just obvious and a time waster, but by making the scam easily visible to people who have the characteristics to not be vulnerable to them, it weeds out all the false positives the scammers would then have to deal with. They don't want you, mr. bright eyed and bushy tailed, who is ready to catch them out only after hours of trying to get you to give them the code to your gift cards. That's a lot of wasted time. They just want granny who will follow every direction.
There was a scam on Discord that involved a fake Discord support person. I played along and was trying to get them to send me a malicious link or ask me to do something they shouldn't so I could report them, but they never got around to it. I think they could tell I was wise to it.