[ThrowAwayIRUK]

SEPA SDD Core has one big advantage for (trustworthy) customers of a merchant:

it's fucking cheap for the merchant :-)

and with cheap, i mean, reeeeeaaalllyyyy cheap (well, depending on your PSP/etc.)

for a bank, the "purchasing costs" per one SEPA SDD at your central bank is in the fractions of the fractions of a cent. (you can check the rates on your local central bank website)