The problem with this is that the stickers and capsules are only worth anything whilst the game are still played. As soon as a new version of the game gets released or replaced by some super cool game, the price will plummet. We saw this happening with games like Starcraft I and also Broodwars etc.

Yes, the online games last a lot longer, because a loyal community are built around the game ....but as time goes by, new players stop playing it and the older players thrash newbies in the game as soon as they join.. and then they leave.

There are simply too many new games being brought to the market, so gamers are spoilt for choice. These skins/capsules/stickers should be ported to newer versions of the game and between different platforms for it to keep it's value.