Ah, interesting xylo. I’ve never seen my credit score tbh - it’s never been an issue as I’ve never been turned down or restricted in an application for credit, mortgage, purchase on finance etc. I think I’ve had the new customer long term interest free offer from barclaycard three times now and they’ve been great for clearing debt and funding big purchases at almost no additional cost.
By the same token, I’ve always been in employment, made at least minimum payments etc, so perhaps that offsets any hit from me effectively not making them any money.
So, I guess it comes down to balancing whether your situation/credit history is such that any hits to your credit score from doing this will put you below the threshold to obtain future credit?