Hi @GailC1,
Welcome to the forum, I think you’ll find this thread here has pertinent information to your question. It’s possible too that some new sitters maybe just don’t know the way it works and then forget to leave feedback. It is however very useful information for both parties and helps sitters make their decision as well as helps homeowners figure out if there’s any areas they can improve.
In the future you may want to start by looking for the theme of your question in the eyeglass search function in the top right corner. Most questions about the sitting process have been discussed and you may also have some new insight to bring to those discussions as well as learn from what other members have experienced.