For a long time Boomla websites has been operated with unlimited resource quotas including CPU usage, bandwidth and emails sends. It just didn't make sense to focus on that before other parts of the product.
The idea was that we will see what the typical resource requirements are and introduce quotas in a way that makes sense.
As the platform usage is growing, this time has come. We have recently introduced usage metering along with usage quotas which you can see on your Control Panel.
Here is an example usage graph by the hour - there are also daily and monthly views.