I agree that there should have been some notice, but you seem to misunderstand the problem. According to Calthine, there wasn't enough traffic. Adblocker or not, if enough unique IP addresses aren't hitting the site, it isn't worth keeping up. And no, donations are not an option. This is a business, not a non-profit. Donations aren't revenue. Even if you donated enough to keep it running every month, there's still no incentive to that from a business standpoint, and a whole lot of potential for loss.