I actually typed out a super long reply the other day for someone that sounded like they were talking about the quick flip game (Use a $1 promo and flip it within 90 days for a profit). It sounds like you might be referring to the same principle, but with a longer hold option at the same investment price-point.
Rather than type it all out again, in case you're interested, I'll link to it here:
https://www.namepros.com/threads/ho...t-with-xxx-in-a-few-days.1366651/post-9483875
Over the years, I've done it a few times, but it was a lot to manage in bulk.