There are no strict rule what words you need to use or avoid. Adverts are relative. Some people will sign up because of curiosity. But, if want really workers, you need to avoid phrases like ??fast earning money??, because someone who is willing to be serious in this job will not believe in that.. There are many "fake" internet jobs which adverts looks like this phrase.. People are looking for a really job, and your adverts need to represent job that is real.