Only Amex Explorer, there are 2 other cards linked to the one explorer account for 2 employees to use for petrol/materials ect.. but thats all included in the spend above (obviously some months higher some lower).
I was really surprised as well, after doing a lot of reading hadn't seen anything similar, and was waiting last minute to make sure no extra last monute transfer deals came out.
The service rep was lovely, she just asked the reason we were transferring andd if it was because of the point changes, we said yes, she said because we are a loyal customer (18 months?) They have an offer they can apply - really strange, but I'm not complaining. Only catch is the double points don't get added until 15th June, so if we wanted to use them in between 15th April - 15th June we would only have the original 329K in there transferring at 2:1. We dont plan on using them in the next few months so no problems there for us.