% growth in portfolio size no longer exceeds % growth in agency's collection size.
Repeating the truth and the facts, as you have done, will do no good, if no one pays attention. You are 100% correct. It's also called, smaller slice of the pie, when the licensing pie is the same size, year after year.
The total market for buyers, is leveling off. The number of images to choose from is over saturated. Microstock is stabilizing. Nothing can have the fantastic, climbing growth rate forever. This is not preventable.
Same thing happened with software companies, computer makers, communications services, cell phone service providers and now it's the future of Microstock where the best agencies and artists will survive and the weak will be culled from the herd.
And ps sales are NOT down "everywhere".