Email spam has no monetary value for google, whereas web spam may (I don't know whether they benefit from ads revenue from link farm and co, but that seems at l

Email spam has no monetary value for google, whereas web spam may (I don't know whether they benefit from ads revenue from link farm and co, but that seems at least plausible). I wonder if the search quality issue is not also linked to a vast increase of the size of internet - searchs are the same throughout the years (couple of keywords), for more and more websites. Maybe vertical search helps there just because they reduce the amount of data to look for ? As noticed by some other people, I have used google all my internet life (since 2000 or so), and google has never ever be useful to look for things like hotel, off the shelve software information, etc... I did notice a decrease of quality in technical searchs like API, etc... (where google has always been effective up to now), I wonder if something changed the last few months.