Still actively use cricket rewards even though mplaces is dead, but this morning I saw this message in the app.
You have until Jan. 2, 2018 to earn points. (They still have the 20 pinch card for $1 Amazon and $2 giftcards for 5000 points.) And up until Feb. 26, 2018 to redeem points.
Here is the link with more information: http://mycricketrewards.com
Kinda bummed as I really enjoyed doing the little check ins, but it was already on the way out.
Edit: fixed typos