There's people on ebay offering to boost you to under 5,000 on the list for £12 ish as they're Oneplus employees. Based in Israel and Slovakia though, sounds legit?
Yeah it's bullshit, they're not employees, and it's a waste of money.
You can boost yourself by making new email addresses and using your own invite code to invite these new email addresses. That's how me and sn00p have jumped some positions.