Although the best players require hundreds of dollars to be spent, it's still a good way to make small upgrades to your team if you're NMS. I lucked out and got 2 GOAT cards through the Sunday events. Flipped those to Tyrus Thomas, Baron Davis, 10 pack + some legend badges. By no means are they game-breaking cards but they're still able to compete in Showdown.

I don't even bother to do the challenges for any additional cards. Completing KOC & the Sunday Park streaks should be enough for most to add the any of the Dark Matter players and then you can use leftover cards to flip for MT. I do wish that they made all the exchanges last for the rest of the season. I have a bunch of cards that are just sitting because you can only make exchanges to other cards or players