On this page, you can see how many runes I've won while doing explorer quests. If you wish to see the logs, feel free to click the # of runes!
One small problem, though, I started logging after I had already completed 200 quests! Sorry!
In total as of January 19th, 2019: 879 Runes
In 4.8k quests:276
In 9.8k quests: 579
In 14.8k quests: 879