I'm putting my money on the former. When Elly declares to the MC, there's an option for "sorry, Elly, i don't see you that way " , which turns out, if you don't go into the bathroom on day 3 , and instead go to Elly, she finds out about Jenna anyway, and storms out of the room, crying "you really hate me, don't you ? " Whereas if you didn't rejected her, Elly's only hangup with Jenna is "but you still like me, right ? " Also remember Luxee saying that Elly is corrupted very quickly, but Ada will be a slow burn.