||+1161878|Marbury-Media said-|| So there is strong evidence that the search is being controlled in some way ? Surely that is not good
I would say opposite - this month is very regular 
You must remember that SFX buyers usually do bulk purchases. You have lucky day you have 10 sale at once, bad day - some tiny 1 dollar effects sales. You must notice how many new SFX contributors adding hundreds of sounds nowadays… you must keep your % items share to remain with your sales level