I'm not sure how Favors are wasted because another player has them. This concept simply doesn't make sense to me.

they will never be used again so there just sitting there doing nothing

But this doesn't impact your gameplay in any way. If you want Favors, get them the same way that the other player got them.

ok i do see many flaws in the idea it is still a good idea with some slight modifications

How would you feel if someone raided your 4 favors? Different story then huh?

read the earlier comments about protecting them

pay 100 favors to protect 100

i was saying if u use real money then they should be protected

you bought your 4 with real money? (from the game directly not another player)

no i earned them therefore they shouldnt be protected