I can understand that skin scarcity doesn't appeal to a casual player. Relevant to this discussion, how would you classify yourself and the people you play with? Approximately how many gems would you estimate you have spent on gem store items and unlocks since GW2 launched (either purchased for RL money or converted from gold)? And if skins were sold at a flat rate of 800 gems per skin, how many would you buy?
No, it doesn't appeal to most humans in general because most people really aren't going around looking to make sure they are in the super duper special club. I've given plenty of examples. It's just not something that's necessary. It caters to a small crowd and once more it can easily be done without the lock boxes I've given a few examples of a way to achieve this for those players who really get a nut off with unique rare items. I think those options are best while still catering to the rest of the players who only want what they paid to get. Do you see what I mean?
As far as who I play with? I play with a group of people I've known for years. Some of them IRL and others I only know online through various games. We've all had raiding backgrounds. Myself at least I'm casual. Not all of those I play with are, but mines out of necessity. As far as money spent well easily over $150 if you count the box without the box at least $100. Only on items that I got what I paid for so character slots, bank tabs, etc etc. I haven't bought anything since the new year since nothing at all has interested me and now I don't even log in. If they revamped their costume system and made the game better I'd buy plenty of their new skins. I have no problem supporting a good game. Problem is it has to be good.
Rift is going free to play in June. So far they haven't announced any RNG chests for their shop. If they keep it that way they've got a customer.