Like has been said some things have to be taken with a big pinch of salt.
I have carpets as an add on only to other stuff, 3 - 4 jobs a week does me and I'm happy at £300 - £400 pw and fit jobs in when I can do them. If I could get a day rate of £700 every day cleaning carpets and upholstery I would give up everything else I do and not have the great joy of employing others