The four-piece boyband, who became only the second ever group to win the ITV talent show when they triumphed over Grace Davies, currently have no less than five separate tracks in the digital store’s Top 10.
At time of writing, highest of the lot is Dimelo, the track they have officially released as their winners’ single.
The version they performed on a live show last month is currently at No2, while the new mix with Wyclef Jean and Naughty Boy is two spots behind at No4.
In between, sandwiched at No3, is I’m Feeling You – their original audition track, which was dusted off for the semi-final.
They also appear at No5 with Mona Lisa, and at No7 with Mamacita.
Runner-up Grace, meanwhile, is at No9 with Too Young.
Still, it is unusual for an X Factor winner not to rocket straight to No1 on the iTunes listings – perhaps in this case Rak-Su just have so many different tracks on offer, their sales are more spread out. Or the combination of Ed Sheeran and Beyonce – still at the summit with Perfect – is too powerful.
Whatever the case, the iTunes chart is just one of many contributors to the main official UK singles chart, which also factors in streaming data, physical sales, and downloads from other outlets.
The defending No1 – Havana by Camila Cabello – is now No8 on iTunes, with Rita Ora’s Anywhere down to No6.
This week’s midweek update will be released later today, although it will only count sales and streams up to midnight last night – meaning Rak-Su will only have had a couple of hours since winning to gather traction.
Whether or not they can cover enough ground by the time the chart tracking week closes on Thursday night remains to be seen.