Quote -  OK.. hm.

Rosity IS playing favourites IMO. The whole Top Merchant thing is their favourites. Do I like it? No. Doi I accept it? Yes. Do I want to be a top merchant myself? OF COURSE - but it's not likely with the kind of products I make. I'm not catering for the boobie crowd and I'm not making skimpy outfits for the Vicki of the Week.

OTOH that is probably why my products so far has been accepted without problems.

Exactly so.  In regards to "Favorites" I would agree but with a condition:
In business, you naturally pay attention to proven performers and are a little bit hesitant when it comes to "something new."  Of course, any port is suitable in a storm and if you're desperate or sufficiently motivated, you may turn to finding a new supplier or new vendor.  But, proven producers are valuable and, in this case, the customers recognize the Artist's names and associate them with, usually, good experiences.  An artist's name WILL sell a product by itself. For instance, I have no hesitation about purchasing an Aery Soul product, if I needed one.  The same goes with most of the top sellers.  (There are some I would hesitate on simply because I feel they're a bit overhyped and quality is mostly implied, not realized.)  For what it's worth, considering what I have of your really neat freebies, I'd not hesitate to buy one of your products as well should I need it.  I have no worries about quality because I have a prior good experience.  :)

Quote - So what I'm saying is, like several has already said here - BE UNIQUE. You may not make a super seller - but there are things that has hit the roof here where I wouldn't have thought it would sell at all, so what do I know? After all my bestselling item is a dirty loo...

ROFL  Really?  Well, I've seen it and I thought it was excellent work.  But, I have no need for it so didn't buy it.  However, you're absolutely right!  Be unique!  You have managed to corner the market on dirty loos...  If there is ever a rush on them, you're in a great position!  :)  (You've obeyed the primary rule - Be unique!  That's nothing to be snickered at in a highly competitive market!)