I hear those stories all the time but no one has been able to actually factually document one of these.
Meaning: Here is the PFL card. Here is my sales receipt from the dealer and here are my receipts for each annual service. If you miss a service, PFL is void.
The new PFL promotion requires a BCD, computer and reg set all purchased within a year from the first item. It must be registered with SP and regs must be serviced at two year intervals by an authorized SP dealer. All items must be purchased from an authorized dealer in the USA. If you miss a service by a few months, SP is generally quite flexible but miss it for a year and you lose.
SP are still good about replacing batteries in Aladins and other vintage computers if you're the original owner and can prove it.