It never ceases to amaze me how these threads almost invariably stray off topic or skew the intended meaning towards someone else's topic agenda(s).
In this case I will have to take some of the blame for perhaps using a poor example. My original suggestion addressed no single quest issue but merely cited a current quest issue to create clarity. In reflection, that was a bad choice on my part.
That said, there are numerous quests where players may prefer the option to purchase a quest completion. At this point in the game, there are perhaps many that would like to finish any number of quests but have very little luck finding a party do run them because they are no longer considered relevant content. I know that personally I would like to get the last boss in GCH, alimus tomb, kbnh and more on my new alt without spending weeks if not months trying to find a party willing/able to run those instances.
Now to address some concerns. As to cost and abuse, as long as they cost more than a daily reset they are expensive/cheap enough. For that matter, why does it even bother anyone that someone else might be able to purchase their way through quests? How is this different from someone buying a daily reset ticket? for that matter how would anyone really exploit it?
As to the GM event and quest auto complete suggestions they are both fine, if someone short-sighted alternatives in my opinion. It's hard enough for people leveling now to complete some quests let alone someone trying to level 6-9 months from now.
Titaia (100/100/55 M/P/K), Safia (100/100/75/60 K/P/W/S) - Badkitty
Vivecka (100/100/60 Wd/W/S), Tuulikki (100/100/84 Wd/W/S) - Unity
Vanora (100/70/70 D/Wd/S), Morz (100/100/83 R/S/Wd) - Aurora
Quote: "Be yourself, everyone else is already taken" - Oscar Wilde