>I always have a feeling that their pricing model is to guess my profits and then guess how much they can take and still gain my business.
"Enterprise-y" pricing is codeword for "smooth-talk non-technical managers at huge corporations and bilk them for as much as they're conceivably willing to pay". That's how the enterprise sales model works, and it can be very effective.
It's not always a bad thing, but it does seem irritating that their only pricing option is enterprise pricing.