I'm aware of this probably similar question, but I think this has a different flavour.
I came across this "freelance job" posted on Upwork (emphasis mine):
Answer several questions on Stack Overflow platform using an assigned account, receive upvotes from the answers and help the account reach reputation points of 15 in total.
Is it just spam?
Is it next-level sock puppeting?
I consider it a violation of the rules, am I right?
Notes:
The suggested dupe: Don't be that account: buying and selling reputation and bounties is about paying for directly receiving upvotes or bounties. This one is about sharing an account and paying someone else to gain reputation on that account. It's related, sure, but I think this is a bit different.
Can multiple people operate one account? on the other hand, states
No, multiple people cannot legally operate a single account.
Which answers the third point.
The job is no longer available, because the freelancer was successfully found. Job stats on Upwork (may not be visible for not logged in users) show "Hired: 1" (in the bottom of screenshot below).