What is the logic behind the fact that credits do not carry over from month to month?

If I get credits for a certain month, why should I be under pressure to use them so they don't roll over to the next month?

Letting a person work at their own pace, what is that thing?

Unless Wix is ​​counting on a person not using up their points, needing credits and upgrading a plan, even though they don't have to!!??