Blue's vets recently merged with another independent vet group, to make a huge multi practice group across 3 or 4 neighbouring towns. They are still calling themselves 'Independent', although I don't think that's strictly true any more. They cited increased running costs and the advantage of pooled resources as the reasons for the merger.
Blue is enrolled in their 'VIP club', which is their equivalent monthly fee scheme that covers wormer, flea, vaccinations & annual health check. Interestingly, that scheme is administered by 'Denplan', (the human dental insurance people) and that's what appears monthly on my bank statement.
I use a different vets for the cat, and they are still a truly independent practice - they don't offer a monthly scheme.