Would the club have a problem with it? I can understand their problem in the early days of the Amex when they stopped people from advertising STs available on a one-off basis on here, but that was because it was technically breaking the law to pass on a football ticket via unofficial means...
As has been mentioned a few times on here, it should be fairly easy to set up a service to match STH with Albion+ members looking for tickets, either on a site like this or on the various Facebook fan pages.
Be interesting to see what happens over the season as in the 4 games we've had so far 2 have been during school summer holidays when attendance is always lower, 1 has been subject to travel cluster****ery and last weekend was a combination of biblical weather and the fuel crisis. Covid will...
Also 16.7% of what you pay for a ticket is VAT that the club has to pay over to HMRC. The club does however employ people that are leading experts in terms of 'monetisation' of fans, so you've got to assume that they know what they're doing.