Why are there limits on so many things in the Enterprise Edition?

I recently signed up for the Enterprise Edition and don't understand why it places so many limits on functions.

For example, we are using a Webhook to send info from our Contacts module to a third party to complete PDF forms. Zoho only allows a maximum of 10 fields to be sent via the Webhook. Why? We need just about every field to be sent.

Also, we are attempting to create formula fields so that the Date of Birth field can pass to our forms in a NORMAL Standard US fashion such as MM/DD/YYYY. To do this we are using a String function formula, but Zoho allows a maximum of 2 string formulas. Again, why? It will take three of these formulas just to get the date in the format we need.