I think the ebay link is to pure Sodium Percarbonate while its just a constituent in the laundry oxi cleaner?
again i think the pure stuff can be used as a no rinse sanitiser too tho it has a short active window, and way less cost effective than starsan.
in the £shop i stand there opening and sniffing each pot before i buy.. it must be a sight if anyone is paying attention,, i have bought pots with unscented printed on em to find em flowery and fragrant on opening at home, those have gone for laundry use..