I don't see how it could negatively effect anyone, just makes the game more accessible. This can easily be bypassed with alternate accounts anyway, which is what most merchants do.
Selling a slayer tab for example, can be frustrating if you dont want to instant sell for the lowest offers,. Same thing with stocking on skill supplies, just any purchase. The GE isnt only for merchants
I don't even understand the concept of limited slots other than being an additional featured advantage of members so as to attract more profits. With that said, members also have limited slots less than 20. I can't even imagine my broker having to call me and say "sorry, you can't request for anymore queues".Art of trading is mere prediction of the future. Very Active: Runescape GE, osu!, Line of Sight
Less Active: Blacklight Retribution PC US,Heroes & Generals