The pricing table on the website shows that all plans other than Enterprise have ‘100 Calls per Week’ which is a joke for any kind of production use.
Without knowing what the overages would cost, you can’t use it in any active scenarios.
I highly recommend using OpenRouter for AI in Make, you can play around with far more generous free allowances from the leading models and depending on your needs, $10 looks like it would go a very long way with the smaller models.