anyone can make a typo when writing but seriously that looks non prof when make a typo in a finish product ,
that only shows that they didnt take time or effort to re read what they have write but lets not try to dont judge them easily that they are a scammer unless you have gathered more proofs that they are really a scammer because thats rude .
not all scammers are bright and scammers are every where on any country .
Typos are understandable and acceptable to some degree. But spelling 4rd instead of 4th indicates that the person does not have a basic understanding of the language.
Even tho the person is not an English speaker, it immediately raises red flags with that kind of spelling error