Every Bentley Perpetual License comes with a yearly maintenance subscription called SELECT.
With SELECT, you will benefit from:
Open Access is what gives all Bentley users the ability to use additional licenses which they do not own, in return for a Term License fee.
Advantages: A term license acts as a supplement to your perpetual licenses. This gives you the flexibility to use applications beyond your owned license pool, in return for a fee.
Disadvantages: Term Licenses are charged at a premium rate and if used consistently are not a cost-effective way to license Bentley products.
What are my alternatives to Term Licences?