No, nothing has changed in that respect, BUT there is a way to do what you want, by using a php block...
This is mentioned here: https://www.tinyportal.net/index.php?topic=14391.msg120508#msg120508
I have a block that is only showing to users with 0 posts, seems pretty much what you want to do:
1. Create a php block, and set the frame options to : Do not use title/frame styles
(this is important, because you don't want the users with posts to see the empty block...
2. Choose the membergroups that will able to see this block. : make the selection out of the regular groups
3. Insert this code in the php block (change the text as you like of course..):
if($user_info['posts'] < 1)
<div style="padding: 0 8px;">
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