Good research!
Well imo this is cheating, the "real-name attestation" rule should not be abused by 1 person to create over 100X "real-name attestations" to get a significant advantage on the lottery. Someone should really check the validity of his "real-name attestations" which is obviously fraud.
Anyway the "real-name attestation" rule is somehow designed to abuse it, should be deactivated as soon as possible and replaced by something else if needed.
It doesn't really matter if that is technically cheating or not, morally it is and given the fact that such exploits are possible the team should immediately address this issue and avoid such exploits being possible or postpone the lottery and change the rules so as to guarantee it to be fair. Or else just lose another piece of community, which I suspect is NOT the purpose of this initiative.
All the address that I checked via
https://byteball.co/ and
https://explorer.byteball.org/ show that these are unique attestations (user_id is a hash of firstname, lastname, birthday, country). So it is not 100% sure if it's 1 person, it could also be group of people who have made it their goal to have as many attested addresses taking part of the draw.
What is funny for me is that when it would have happen with anonymous addresses then we couldn't even see that something is out of place, but thanks to real-name-attestation, we can see from explorer that these are all different people, but funded with 10GB by same person. Hopefully, if they win (would be epic if they don't), they also spread the winning amounts to all the people who participated in it by signing up with their attested wallet. If they don't, then it's more clear if it was one person with lot of stolen identities. But then again, maybe this one person keeps the bytes while rewarding the participants with fiat currency, we can't really tell.