How much does it cost for riot to make a skin
why is it so hard to make skins for champs that have low popularity even if they don't sell well
why is it so hard to make skins for champs that have low popularity even if they don't sell well
They make skins for low popularity champions. Fuck, they're actually making an effort to make more skins for low popularity champions. However, they'll probably always get less skins than popular champions, because those champions just sell more product and thus make more money.
They've said somewhere that skins take a couple months up to half a year-ish to create. That's a ton of work hours from artists.
Popular champs simply sell more, hence why popular champs get more skins.