Such a scheme previously existed. It was called a Private Seat Licence. I can't remember how long the commitment was, but I think it was either five years or "lifetime" (actually 50 years) - exactly the same term lengths that exist for 1901ers.
To be clear, the 1901 contract is split in to two parts: you contract for a licence for your seat (which allows you to transfer it to other people with the club's blessing) for either five years (£500), or 50 years (£1000). Separately, you contract for the games for a fixed five year period. If you bought a 50 year licence, but decide you want to stop going to games for some reason, you can sell the licence to someone else (if you can find a buyer - I'm guessing this may now be easier than it has been!), but there is no right of refund from the club (again, the club may now be more amenable to taking them back off people's hands).
But wasn't that 1901 only?
I'm thinking giving season ticket holders the 5 year option for their seat, thus guaranteeing income and increasing loyalty points accordingly.
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