I see it the same way as @AHOYBRAUSE. We regularly host various competitions in the German-speaking Bitcointalk community and unfortunately had to learn that we need such rules to prevent cheating by participating in the game (multiaccounting, ...). It has also proven to be a very good rule that a certain (but low) number of merits was required in the last 6 months, e.g. 10 merits in 180 days. This also prevents accounts that have been closed for a long time but reactivated especially for the competition from participating.

Otherwise: Who would ever say "No!" to another competition?