Not all of them are scammers.
There are legal problems launching new coins on the Internet, so many developers prefer to remain anonymous
Yesterday i asked an alt dev to reveal his name and his identity but he refused. Here is the reason the dev gave to me:
We won't be releasing our personal information because we don't want people breaking our doors down to rob us because we made the most successful crypto in existence. Think about if Satoshi Nakomoto has given his real name... That man would either be in jail or dead. There is a reason people choose anonymity when it comes to cryptocurrencies.