hi Celsa, first of all thank you for your interest in supporting mozilla! i think for this cycle there won't be any new payment providers added, as the donation campaign is drawing to an end soon. some more ways to donate (like via bitcoin) are described at https://wiki.mozilla.org/Ways_to_Give in general mozilla is certainly aware that in some places of the world there are more popular ways of transaction than via credit cards, like direct bank transfer or the ideal system you've mentioned for the netherlands, so those might be implemented in future campaigns. if you want to provide more feedback about this, please write an email to donate@mozilla.org, as this will be read and answered by people directly involved in planning those fundraising campaign.