are not made by TGC themselves
H&K,
I know, and the quality varies between packages because of this... but at least TGC promotes them (and gets slice of the income) on the same page as the "programming language". BRL has one tiny link to toolbox on their front page but no links to "Blitz-friendly" content. Ppl do announce Blitz-packages on the forum but those get swamped real fast and the newcomer doesn't have a clue where to find stuff.
But I do agree what you said.