Surprising that none of the people who want to use a ticket would be a member and that £25 is beyond them all. Not in reasonable of the club to want to know whi's coming to the ground.
In addition to it not being unreasonable, it is likely that we are going to see a lot of restrictions that aren't life altering stay for a while after society opens back up. Contact tracing is probably going to be the most obvious of these and, to me, the club are protecting themselves for a likelihood at worst here (it is implied in the FAQs that this is the case).