SL has *long* had a culture of using things for other than they were intended. And the Lindens, by not acting against it, have effectively encouraged it - especially because, in the absence of action against them, the market tends to reward them.
Megaprims. Just banned from new creation, not banned overall. Originally they were sold for money, making the original creators instant business monopolies. (Ok, they became freebies later, but still.)
Scripting. In this area it's all over the place. You weren't "intended" to rez twisted spheres on top of people to slam them down to the ground. You weren't "intended" to be able to push an avatar so hard they pass through walls. They weren't banned, though, and crush weapons and local teleporters made their creators money until they were so ubiquitous that the Lindens (apparently) had to modify Havok 4 to enable them to continue working.
Building. Ever dimpled a box? You had to fiddle with the Prim Type to make that happen, remember? LL could have put that option on the Box type if they meant it to be there, so, gee, I guess you went against LL's intentions... will you be paying per prim created or a global monthly fee?
The point is that the rise and rise of tricks and traps and secrets and similar in SL has created a culture which has said "ignore what seems to be intended, just do what works". For LL to suddenly turn around and use the fact people did that to justify increases in this way is a huge betrayal of the values they have allowed to develop in the world.
Oh, and on the same topic, a vote or so on https://jira.secondlife.com/browse/MISC-527 (the same thing as this post but related to the building issue above) would be appreciated.
