Sanctum coins should only be used for the merchant - NOT offers/benevolent fountains

It feels really bad playing sanctum and being unable to pay the 5 coins for an offer or the 150 coins for the fountain boon if you have a combination of the "lose 30 coins on end room" affliction along with another affliction or two that impairs your coin pickups.

I don't see why there's any need to have coins be used for anything other than the merchant. It just makes those afflictions extra punitive and really removes any reward generation from that sanctum run except for relic drops.

I suppose I can see some reasoning for paying coins for the fountain boon since it impacts that sanctum run (though I disagree with it), but it's absurd that coins are required to pay for offers which award you currency.