30g for 1st
15g for 2nd
0 for 3rd
maybe toss some wvw rank potions in with or without the gold.
You don't get rewards if you haven't played 2h of wvw that week. This might also incentivize pve guild groups to get into it, one raid a week to bring some life back. it also de-incentivizes servers that intentionally tank while they have 3 map ques all playing at the same time. because lets be honest, who enjoys fighting stacked servers with 30v70 every single week while unable to drop tiers?