Alamy stock photography pricing

I must admit that I am a little shell shocked at some of the prices recent images have sold for on Alamy. Three sales in the RM editorial genre for less than $100.00 total is very scary indeed. Even a year back, those three sales would have been worth a combined $500.00 approx'. What's going on ? Package deals or similar no doubt, but it seems clear that my own strategy now should be towards pumping out as much RF material as possible. RF certainly seems to be the only way to attract decent pricing these days.