The reason that this probably won't happen: You're going to level up regardless. I already see enough threads about people complaining that there are 100 win level 30s. If you like the game, just play and level up as is intended. If you REALLY want to get to level 30 so bad, I guess you'll either have to play a lot more, or buy those boosts with REAL money.
IMO, those first so many levels are literally there so that you can "farm" IP for champs and rune pages before you get access to ranked games if for no other reason.