A companion, informally. As it appears here, part of a named payment service.
English pal (17th century), borrowed from Romani phral/pal (brother), ultimately connected to a widespread Indo-European word for brother also seen in Sanskrit bhrátā; a companion's word carried into English by Romani speakers, later lent again to the name of a payment service.
A companion's word, borrowed here to name the third-party service through which support can be sent.