Slowly making progress. I have not spent anymore money past my initial $120. All of the important item drops and levels were from playing the game normally. My $100 only got me an ok level 4 weapon and duplicates of Amber so I don't feel like I paid to win.
In fact because I paid I now feel I am at a deficit compared to even AR 20 players strangely enough. As cool as the new event is it makes it worse knowing for me this is merely a way to grind out my money's worth rather than a special event.