As you may know FileMaker Inc. offer you discounts for multi year renewals. Currently you get 10% discount on the 2nd year (effective 5% on total purchase) and 20% on the 3rd year (effective 10% on total purchase).
We like to mirror that for MBS Plugin purchases. So if you like to commit to order for up to 5 years, please let us know. We may provide an invoice for you or just give you a special coupon code for the website store. But if there are other sales going on, we may not combine the offers.
PS: This is a great way to lock in the current pricing for future pricing changes.