Runes -
Are too expensive.
With a boost, I reduce the games needed to get a completed rune page from... ~87 (win/loss I picked roughly 100 ip) to.. ~44... That's still around 5 and a half days at 8 games a day. Doesn't that sound insane? 7 day boost, which is $8.00 and then 26 hours (35 minutes per game, although it's likely higher).. For one rune page. Or without a boost, it's 51 hours for a full page.
To me that sounds like an incredible amount of work to get something that is pretty necessary for the game if you plan on playing any ranked.
One full runepage of the cheapest tier 3 runes is 8,610 ip. That's more than any champion and it will seriously take months to fill enough pages to play ranked adequately (Not double stacking boosts) The most expensive, hopefully my math is right here, is 28,290 ip. O_O