Used it twice last season and it works well . You get 1/19th of your ST cost credited to your account which you can use for cup tickets or save for next season.
Yeh not a bad deal by Moshiri for Moshiri !
Bit of background on Princes
https://www.thebusinessdesk.com/northwest/news/2155908-foods-group-commits-to-liverpool-base-following-60m-royal-liver-building-deal
I think the club will do something for fans without phones / non compatible phones. I just don't see them giving season-long plastic cards that could be passed around.