After taking a look at TC's site, I would like to encourage Digi and third party dev. to have a similar policy to TC:
"If you decide to purchase a permanent license, your accumulated rental value of that same license (for the same Mainframe) will be refunded. This does not happen automatically when purchasing a permanent license from tc-now.com. To achieve your refund, keep your invoice(s) and send them to
[email protected] with a request to purchase a permanent license. "
This would be great also.