The dates suggest that Sarah may beat out much of the stiff competition, lasting until late in the series, while Heather and Snezana could be neck and neck for the final rose.
Heather, aka H-Bomb, who seems to be Sam's bestie right now logged back online on July 29, the air date for the new season.
Perth mother-of-one Snezana, who is not an avid social media user, waited a whole week later on August 4 to start engaging with users.
Rachel Moore, who will saunter into Sam's life this week as an intruder, returned to Instagram around the same time as Heather
Fellow intruder Lana Jeavons Fellows waited until just last week, about the time that their cover was blown as newcomers by Daily Mail Australia.
The revelation of their identities may also mean that their ban from social media was lifted by production.
It suggests that Snezana and Heather, who are both tipped as the hot favourites, have had more restrictions placed on them than others - which might suggest they are the last two standing.
It also tallies with an interview with
Zoe and Monty's 3pm Pick-Up on 1065 KIIS FM radio show on Monday when aspiring film director, Heather, appeared to accidentally reveal that she wins the show.
'I'm so thankful for that [time] because it means that I made a really good friend, as well as a partner,' she told the hosts.
The 29-year-old seemed to be referring to the time Sam Wood and the female contestants spend together off camera, which allows them to develop meaningful relationships away from the lens.
The table of departures is just one of the many rumours and theories surrounding the show.
The bachelorette's return to social media:
March 28 = Madeline posting on Instagram (eliminated episode three)
April 9 = Jasmin posted on Instagram
April 13 = Jacinda posted on Facebook
April 15 = Ebru posted on Instagram
April 22 = Emily posted on Instagram
April 25 = Bec with Emily in Bali on vacation
May 4 = Sam at Logies with Sam Frost and Osher
May 16 = Sarah with Emily in Instagram pic with other girls (Ebru and other girls also together)
May 19 = Nina posted on Instagram that she's back
May 25 = Sarah posted on her Instagram
July 28 = Heather posted on her Instagram
July 28 = Rachel Moore (Bachelor intruder) on Instagram
August 4 = Snezana back on Instagram
August 19 = Lana Jeavons Fellows (Bachelor intruder) on Instagram