It's not about whether someone enjoys it or not, it's about value for money. I think it's a great minigame thing, it would work fantastic as a F2P title like TF2 (with continuously added content and premium items like costumes and collectibles) but I don't think that the amount of content or the features justify a $60 price tag. I'd pay $20-25 for it, that seems fair - I reserve full retail price for full retail games. On the same token I wouldn't buy Super Pokemon Rumble on the 3DS since it's a sequel to a WiiWare and it's not worth full price, that doesn't make it a bad game, just a badly priced one.
Actually, the sad reality is how software is priced in general. Its not really based on value at all. Companies figure out the highest price tag they can slap on their product that people will pay for. Regardless of whether or not the content is any good. Its completely arbritary, it applies to all game consoles, computer software, mobile apps, you name it, if its software for sale, this applies.
I can't comment on Splatoon as I haven't played it myself, but I've always found the cost of most software unjustifiable tbh. Want the full blown version of photoshop? That'll be $1000 please and thank you

. I can understand putting a higher price tag on software being used by others for commercial purposes but still most of those price tags are completely outrageous. Games being $60 a pop is also absurd, I don't like it as much as the next person, that's why I seldom buy new games, and often times when I do its at a discount because its used. I understand many of the blockbusters require a large budget to develop them, but with millions of copies of that blockbuster game being sold at $60 a pop, more than enough is made to get back in the black and still make a really nice profit.
*sighs* arbitrary pricing is bad for consumers end of story... This is a big part of why many people pirate....
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Russia is a special case. It's probably best not to compare much to how things work over there, at least on a market level.
In the Russian economy 13USD is a good chunk of change:
https://www.google.com/#q=13usd+to+rub
If the price was any higher in that country NOBODY in their right mind would buy it.