I've done numerous event dungeon runs, up to and including 5x but I haven't gotten any more coins from doing so. I think I found a bug that is preventing me from getting those coins. If I enter the dungeon solo and then exit, I can talk to Nipsy and he will give me a Coin of Tales Told (I can do this repeatedly for more coins--that don't seem to count in the store). The first time I did this was accidental, and it shut me out of Coins going forward; I've deleted/discarded coins but to no avail. I still can't accumulate event coins from dungeon runs. If anyone has done this, it may keep them out of the event (seasonlong); we should be compensated with the coins since we can't do the event.