Why is the person in first place rewarded with a Ledger? Does Ledger sponsor this? No, as far as I can tell. It's just Betnomi (and will be sponsored by CryptioS later on?). Ledger is closed-source and not recommended.
Potentially, unfair too if the other sponsors are doing it for publicity, and then Ledger is getting it for free. However, I absolutely agree, it should be a standard, even if Ledger were willing to sponsor the event, I'd rather not advocate for services or products which aren't open source.