I'm going to attack the tales series here because there is doing it right and doing wrong. Now no comment on buying glad or xp, thats as bad as battlefield and every other game for quick unlocks, you want to waste that money go right ahead, It's only more scumbaggy the harder the stuff your selling is to unlock. Persona 4 arena takes the cake there, You want your fav character to be your support during battle, get ready to do some insane task or insane grinding or pay like 3 bucks... Lets go after Vanity items here!
Now the full disclosure is, anyone that played and beat Tales of games around the ps2 or even ps1 era before the whole DLC marketplace extra costumes were free on the disc. You unlocked them mainly by getting an title in the game, and then equipping the title changed your costume, or you beat the game and in the new game plus shop costumes were a choice for your next play-through. Did these costumes add anything to the gameplay, No but a player that goes through a lot to unlock something, vanity or useless or not, Is so much better then points added to a meaningless score.
Now something that just vanity whither or not the player or community buy it or not an how much they buy depends on pricing! When your stuff is in a market place one thing you should do is price your stuff Competitively! When Tales games are asking 3-5 dollars for their vanity costumes a piece, and another game is offering 1-2 dollars per or an discount if you buy a set of four buy 2 or 3 dollars. Now I have to point the finger at Little Big Planet and say, This guy, does it right. I've spend upwards of probably 30 bucks on LBP 1 vanity items alone, probably the same amount on LBP 2, Did I have to, Hell no, Just buying and playing the game you unlock or get outfit pieces to make upwards of 20 themed outfits not counting you can mix and match everything. Driving the nail in harder the game was online, if you bought some costumes and made an badass sack boy or girl you could show it off yo uour buddies in game because the costumes you bought came in pieces and they are mix and matchable to. Also not that we needed more of a reason to check the shop they gave out a lot of stuff, For FREE. Lastly to drive some value added, to your purchases, when LBP vita came out and they said, "Hey guys you know all that stuff you bought for LBP 1 and LBP 2, well you get to use all that stuff in the vita version and don't have to pay a cent to do it, also that goes the same for karting, oh and wait if you buy vita stuff that will work on LBP2 for the PS3..." Now I'm pretty damn sure I'm not the only one that looked at that and said "Here's a bunch of money for everything I remotely want cause that is FRIGGEN AWESOME!"
Now looking at tales, You may or not unlock a costume on your own in game, I'm not really sure, but they basically say, "Don't want the default costumes, Pay me 5 bucks in graces, 3 buck in Xillia. Oh you want everyone to look the same, 30 or 40 bucks in Graces, 18 bucks in Xillia. Now a bit worse, if you want all the costumes in Xillia, right now if the 3rd set they've shown hit the market place, 54 bucks plus your planning on more already and the games been out a month about? Is that worth it for just costumes that you can't mix and match, can't show off, and really do nothing, No. Now I don't have to buy it I know, but Namco sure as hell wants me to buy it advertising it to no end. Hell the 3rd set is costumes classic characters wore to try to pull at nostalgia to weasel the money out of me. Now this has been a complaint since Vesperia in what 2009 so I'm not the only one that feels this way and till they set the price at a decent price, I won't buy it. 1 to 1.50 per or a complete pack for 5 or 7 bucks hell ya, 18 not an chance.
Now as for competition, DOA 5 of all games, gives you 2 - 3 times as many costumes for the same amount of money you would spend on Xillia costumes. This is DOA for friggen sake. It's not like in the game already they don't have a ton of costumes to choice from and I'm sure as hell with umm physics and how in decent some of them look, they took a lot more time and effort to make! I mean, if you can't even out price them and basically everyone else on the market, I'll buy their crap first before I think of wasting money on your crap.