I didn't see any announcement on the forums here (big surprise, huh? NIRs have pretty much given the middle finger to the forums) and I don't visit discord. I know usually around the New Year they the Adventurers Guild offers recharging enhancives for silver!
I don't know how long it goes for, but as of right now (1/2/23 @ 11:30am Central) you can use silvers to recharge your enhancives instead of bounty points.