I think that having Marks of IP would be an interesting feature. The base would add 5 IP to the player's base winnings at the end of each round. The second tier would add 15 and the quintessence would add 45 - 50. Also, the base tier would cost 150 IP.
Runes should be for the game at hand. They shouldn't pressure/trick players into making sub-optimal gameplay decisions.
Such runes (for bonus ip gain) would be in the same pile as "time spent dead" runes, as they would only be useful if you're losing but if you had taken a different rune they probably wouldn't end up behind enough for the rune to be useful at all.
I don't think this is a good idea because it means that you have another goal than winning. Instead of going for stats that could help you win, you are selfishly looking for more IP.
What would be the point of IP boosts then?
why would you give up in game stats for IP ?
are you trying to lose ?
