Luck is always a factor in everything, but what really matters is being prepared to take advantage of it when luck strikes.
1) many songs had almost no downloads in any world. They were “truly bad“, and avoiding that is the skill
2) amongst the non-bad, different song is went viral in different worlds. That is the luck.
So you’re both; half-congratulations!
https://www.princeton.edu/~mjs3/salganik_dodds_watts06_full....