Thank you for your post and Welcome to the Forums! We certainly do value your loyalty and are happy to see you are looking into renewing your contract for a new device.
Device pricing for hardware upgrades is based on your price plan category. If you have a higher category, you may be eligible for a higher subsidy on certain devices than customers in a lower category. That being said, it's not necessarily impacted or impacting your corporate discount. This should have been discussed with the agent who made you the offer. Some of the plans are eligible for a 10% discount instead of a 30% discount simply because of their eligibility.
Please reach out to us via private message @CommunityHelps, if you would like us to take another look to your account to validate the offer made to you. Click here for the instructions on how to do so. Thanks!