Lunar event

"Open bigger chests for bigger prizes."
Either it's varying chests levels or it's bad ol' Superchest. Presumably the latter. Hopefully they actually linear out the Superchest progress bar.

Best to assume Wild west bots will only be event currency exclusive. I thought it would be the case.

I also hope they'll make the progress bar linear - making it the way they did is a douchebag, intentionally misleading move and looks like a desperate cash grab even if it isn't. I told them as much in feedback.

As for the WW bots... They're a bit meh anyway.

What I do hope though is that this is not the general "new content" system we're seeing here.

I've seen this in apps before - in some of them I've spent pretty considerable $ when they started out fair and relatively benign to everyone because I like spending in apps that don't pull my sleeve for cash every 5 minutes. But then, what do you know, there's an event and you can win this exclusive thing if you pay enough. Okay, I paid. Played with it, was nice.
Then next, there's another event a month later and the new card/item just happens to be more powerful than the last. And so on ad nauseam - basically new progressively more powerful content is released periodically to milk whales and it completely obliterates the game for everyone else. Seen this in a couple of apps, some of which have since milked everyone dry and shut down unceremoniously. There are even a few large and successful mobile companies famous for doing this over and over. Exploit and move on, like world-harvesting SciFi aliens.

I hope this is not where Pix is headed with its newfound robot exclusivity.. But I do fear it may be, since they talk pretty openly about how user acquisition is important and how once you acquire enough users you can start monetising your app (there were blog posts on it from their staff somewhere).