If the person bought a ticket from someone and knew they could claim the point for it, I’m fairly sure they’d do it if it meant they climbed the points ladder.
The seller, knowing that folk could claim what would have been their point, would perhaps think twice about buying tickets and selling on as if it became a regular pattern, the club would then be able to kick them off the scheme for away tickets.
Can't make the semi final? Sell your ticket and lose a shot at the final.
Keep your ticket, get the loyalty point but leave the seat empty, increase your chance of a final ticket.
So really, you're relying on bears to grass on the guys who just sold them a ticket.