“Why are we bringing it back?” asked Bishop Nicholas A. DiMarzio of Brooklyn, who has embraced the move. “Because there is sin in the world.”
The sale of indulgences has been outright banned since the 16th century. However, the article indicates that the church will be more likely to grant an indulgence to those who make donations to the church - which isn't technically selling, I suppose...but...well...ya' know.
There are, however, other ways ot be granted an indulgence.
Anyway, I have a love for the concept of indulgences (I'm not being sarcastic, I actually do like the idea), as it introduces a weird form of accountancy to the practice of religion. A particular indulgence will reduce post-death punishment (AKA Purgatory) by a particular number of days. So, you could conceivably try to calculate how long you will spend in Purgatory, and then try to balance this out by indulgences, to come out with a sum of zero.
And, well, that notion kind of appeals to me.