its the explosion in people having access to the internet,forums,online window cleaning magazines,WFP,recession etc.
i dont see the problem in posting earnings and what you can earn in a day etc as most newbie window cleaners will be sadly disappointed when they start up and only earn a fraction of that for a good while as you need to find the work,price well and keep the customers!as well as build up funds for emergencies,sickness,holidays,tax,insurances,new equipment etc.
and then of course there is the weather issue and boredom,late paying customers,non paying customers!the list goes on!!

just concentrate on your own business and do the best job you can and dont worry what other window cleaners are doing/charging etc.
there is a lot of glass out there that needs cleaning!!
