Quote - How about total sales in 6 months. Say if in the first 6 months it has less then 20 or 30 or 40 (what ever) sales it goes the clearance/warehouse route.

Yes, but this proposal was ignored, it doesn't matter if a product had no sales at all or was sold 200 times, is just enough to not have one sale in 90 days.
Some products are a fracass, not because it are bad, only people don't want them.
I don't care if a product that nobody wants and had only one or two sales to be deleted of moved to Clearance, but imagine how I feel when a product that people like, had 100 sales, more than 100 in the wishlist is killed!, it had only the bad luck to not have one sale in 90 days.
And this happens, the sales are not uniform, there are periods in the year that I have very few sales, or still have sales but only one or two products being sold and with the remaining nothing.
It can be seasonal variation or who knows the reason. November 2005 was an excellent month for me, but November and December of 2006 were the worst for me. It's a variable period and each time I enter this period my shop is slaughtered.
Today I have only two pages of products at Renderosity, I have made more than 150 products in these years, but only few survived!
I made products for scenes, it are general use products, it can be used with Posette or Vicky6, it run with Poser4 or Poser 10, so I could have easily more than ten pages of products at Renderosity for any kind of use, taste and preference, but the cruel and sad reality is than only remain a little more than a page.......

Stupidity also evolves!