Sounds like a scam to me!
It isn't a scam. People are just careless and stupid. I just posted it is real jobs with real companies. The ads are on the job section of the paid to click on this site which goes to indeed dot com. People are just stupid. Look at the news articles. They are the same way. Full of mistakes, words used incorrectly, spelled wrong, you name it.
My thoughts are I wonder how they get people who are worth anything to reply? I do not think I want to work for a company who runs ads and cannot properly use their, there, or they're. Or misspell common words.