It seems like scammers would always find away to harm people. But, I'm surprise that this happened to a trusted app like Coinmarketcap? how would coinmarketcap would let this slide just like that? it is a big platform which already around for a long time. they should update their app security immediately.
Even without knowing much about this seeing this on the profile has shown that it is a scam and we all need to be careful, since the day the dog was announced that it would be listed, many scammers have raised to look for a way to scam those who work for the airdrop, Don't be surprised by seeing a trusted app like coinmarketcap, many apps are trusted but scammers always find a way to use the app to scammed people and again all app is not to be trusted, if you don't believe the app or doubting something about it is better you ask or don't use the app.
During the claim, many people are looking for a trusted app that they are going to use in the exchange of their dog coin so that they will have a good price when the exchange starts, although it is not bad to look for a good exchange but we should be careful with some app because many scammers are ready whenever they see that many people are going to earn from airdrop.
It is still dangerous that people might not notice their profile. I have to admit that I didn't notice it until you mentioned that there is something unusual on those scammers fake account.
I usually check it back on the official Twitter/Telegram/Discord, if nobody talks about it on those group/channel, then it doesn't exist, that's how I know that it was a scam.