Consecutive Win of the Day Rewards

Alright, I've read some forums about daily rewards and how they could make the game too easy or make champions and skins too easy to collect. Well, I've had an idea about a way to modify the "Win of the Day" mechanic...

Okay, so maybe we could have it to where every day you get your Win of the Day reward it can stack into something greater the next day. Say for instance...

Day 1: 150 IP Day 2: 200 IP Day 3: 250 IP Day 4: 300 IP Day 5: 350 IP Day 6: 400 IP Day 7: 500 IP & a Hextech Crate w/ key

That's my idea anyway, any opinions?