Why does Monopoly Go app require credit card information for updates on iPhone?

Hello I have a Big problem I have a game on my phone called Monopoly Go and I would Allways be able to update it when asked now when I try to update it’s asking for my credit card information AND IT NEVER ASKED THAT I UNINSTALLED IT TRYED AGAIN AND STILL ASKING WHAT CAN I DO TI FIX THIS ??

[Re-Titled by Moderator]

Original Title: Updating Apps