I've also been playing Endless Frontier.. It's one of the least pay to win games I've ever played.. You get rewards of in game currency every day and other super rare stuff for free, it makes no sense to buy anything imo
I actually went and bought one of the packs (with a permanent spirit-highlands upgrade, so not one-off currency) recently, just because I figured I'd been playing for basically-free for so long that I might as well contribute a bit more.