Also seen same in Pontybodkin. Saw the green box on the pole, then it bounced along about 7 different poles to a farm.
I thought this was usual as it did just appear to be going to one property. There wasn't anything else that could be served near the farm. Openreach wouldn't usually wire a leased line in this way, then just run the fibre straight up the pole and bounce it along the other poles, no need for a green box on the pole.
When I spoke to BT Business recently they indicated they were selling this service and it would cost £150 per month. This was for 330/30. We didn't get as far as looking at install costs as the monthly cost was too much for my company.