In 2001 I bought a seat of Xilinx Foundation (before Ise). I did not renew the service contract because it was working fine, and then Ise and WebPack came out.
I had to go to the post office to sign for a certified letter. In it was a check for $0.03 reimbursing me for an overcharge on state sales tax. I hate to think how much it cost them to repay this, with clerical costs, printing the check, sending out the certified mail, etc.
Jon