Hello,
Here is the view of an "old" player.
I don´t like the idea of an IP reward because there is nothing i could spend it on.
Let me show some math.
20 Runepages * 6300 IP = 126k
51 Quints * 1000 IP (average) = 51k
99 Glyps * 400 IP = 39.6k
81 Seals * 400 IP = 32.4k
72 Marks * 400 IP = 28.8k
This makes a total of 277.8 k Influence Points
Since normal playing is absolutely enough to buy every new champion, I won´t be able to use an IP reward.
Coming to the next point, a skin Reward:
Getting 277.8k IP needs if you get an average of 100 IP per Game (Bonus of the Day) 2778 Games.
WIth an average of 25 mins each, resulting in a total of 1157 h playing (48 Days).
Even with just 1€/h refund it would mean (1157 / 50) * 8250 RP = 190k RP.
So even if you get like 10 Skins each Skin it would be worth 19k Riot Points or 115€.
In the case of a RP reward.
A champ wich costs 6.3k IP or 975 RP, means 154RP equals 1k IP.
154RP*277.8k IP = 43k RP
Will Riot give those "old" players who have tons of runes such an amount of RP, sadly I don´t think so.
Greets