update,
support answered:
Was die Paysafecard Zahlungsmethode angeht, sind die Beschränkungen nur von der Seite Paysafecard eingeführt.
means in english "regarding paysafecard-payment, the limits are only from the side of paysafecard"
so it seems my.com's anti-fraud department has only limits for paymentoptions where the customer can pull back his payment but not on the paymentoption where the customer cant pull back anyway
thats logical and good
so next question goes to paysafecard-company about their limits
if they have no limits too (or only some which can be easily bypassed) there is nothing standing in the way of someone who wants to get full level 13 runes
i will update this once again when i have an answer from paysafe