Flattening of Adsense revenues
I thought I was the only one facing this problem, but it seems to be widespread. If your revenues do not increase whatever you do, it is time to move on. This year I spent a lot of money on domains experimenting. Many things did not work out as expected, but I have managed to develop alternate sources of revenue (not from domain parking). For other revenue sources, the income increases in proportion to the effort and time. There will also not be much competition also since not everyone can afford to spend so much initially to learn from their mistakes.