Skin-Boost Rework Proposal:

50% of the RP used in a skin boost will go towards the skin you activate from the boost, reducing the cost in the store.

The logic here is that more people will buy boosts if it actually goes toward something permanent. Riot has nothing to lose from this, as it will entice more boosts to be bought, and inevitably more skins will be purchased as well.

Players are more likely to spend a little RP than a lot of RP.

Players work toward buying a skin on champion, and riot makes more money

Everybody wins!