If the ticket machine at THA actually worked more than 5% of the time I'm sure that would increase the % of people actually paying to travel between the stations where there are no barriers/staff on the Kennet (B & H) Line

Saying that, I have also seen a few occasions (during the hours when the Ticket Office is closed) recently where a human replacement has been stood by the machine when it's u/s, but this obviously cannot happen all the time.