On Upwork, there is a system in action called "candidacies."
Basically, this means people can say they would like to work with you. I view this in the same way that I view people who ask where can they buy my books?
I've had so many proposals that came to nothing, I have got to the point of not caring.
A good laugh - or an insult - depending on how you view the situation. I had a request for work that opened "As you have written a good romance for me before."
That would be a compliment, but I'd never heard of the person before, and after checking his profile I found I was right in my assumption. His request was a bulk generic letter, and was sent to over 60 other writers.