I know, I have probably spent around 5 hours looking for some kind of answer but no luck so far. Maybe it is just me but since all of the sticker and progression data is stored on the EA servers it seems as though it would be very simple to add such a feature if it doesn't exist already. The downside of this is that the rumors might have originated from a bug in the way that linking the accounts was dealt with by the servers. Which hypothetically could have been removed due to the possibility of exploitation, although i personally don't know how such an exploit could be effective considering that all of the data is, as was previously mentioned, stored on the EA servers.
