Oh, come on! The problem is not the price tag.
The problem is that pack is unobtainable for most of the players. When you lock that after you promise not to do that again, well, that doesn't look too good, isn't it?
The sole motivation, for me anyway, to spend in this game was F2P status. I felt like was my duty to support a developer who treats me fairly. Wherever I was asked "why to play this game?" my response was "because is fun, look amazing, story is mind-blowing and everything you see you can have it for free, if you don't want/afford to spend real money", but that's not the truth anymore, isn't it?
Btw, not that is matter, but out of curiosity, I actually calculated how much I've spent in Warframe so far. Less than everyone, it seems, only 683 €.
By the way, until I played WF, when I spent money in a game, I did it to earn other money back, obviously more than I spent, for profit.
When I entered the world of Warframe, I progressed from Corpus to Tenno.