A person of notable influence or a close relative is a suitable offering in regards to opening the gates and keeping them open.
Serena and Venus gave up their sister, Bruno Mars gave up his mother, Kanye West gave up his mother, John Travolta gave up his own son, Michael Jordan gave up his father, Sylvester Stallone his son, Dr. Dre gave up his son to get bumped up.
Ariana Grande had not given up anyone before London. She was able up to that time to keep her fame by getting dug out in close circles as a whore for high powered male and female execs and industry players. But that only last so long, that ritual in London really brought her into the fold..Mac Miller was a good chip to trade because he had a following and was of no use at that point. The more souls she claims the more power she gets..she wants that Beyonce and Taylor Swift fame.