Spell scrolls with tradeskills tag recently added?

[Astori]

I was bored earlier today, so I hopped on my druid and went to the holgresh cave in Wakening Land. After doing my part in the effort to eradicate holgresh, I noticed that every spell scroll they dropped now has the "This item can be used in tradeskills." tag. After checking some spells in the bazaar, I see that a LOT of spells now carry this tag. Among them: Chilling Embrace, Improved Invis, Monster Summoning II, Boon of the Garou, and Translocate.
At first glance, the tag seems to have been added to scrolls that:

1) Are useable only by INT casters;
2) Are useable at or below level 50 for at least one class;
3) Do not teleport across zone boundaries; and
4) Are dropped by mobs.

The only spell I could find in the bazaar that violated these rules is Atol's Spectral Shackles (wiz/51).
So, does anyone know why these scrolls are tagged for tradeskills?

[hangovr]

It could be the PoK quests that return a 5 charge low level "other class" spell item (ac, invis, ivu etc).

[Elfdruidess]

I can confirm that all the spell scrolls you are mentioning are for the PoK quests as described above.