The odds are very very high, nonny. Registration windows were like 24 hours long, maybe 48 MAX. Literally thousands of people would join per window and all have the same join date, so the odds of two different people (even two with the same money-making strategies) joining on the exact same day are exceptionally high. Those are also like 2.5k users apart, so very likely in different time zones entirely. Chill your paranoia.