I do not have an issue with folks having multiple accounts, I do not see it affecting my game at all.
What would be the advantages? Gather twice the more desirable DNA to transfer to one account? Ok, so they progress a bit faster than they could have. We can trade with 49 other players now, isn’t that basically the same?
I do not see it giving them an advantage in Arena. Sure, they might have bigger, stronger Dino’s faster, but many folks do already. Many are at level 30. They will still move up and be paired with similar trophy players. Even if they have some hard to get unique, they will eventually hit their threshold of trophies and meet players who thrash them back down. Even if they are able to get more DNA, multiple accounts will not make them better players or give them more skill.
Unless they have multiple devices, they would have to log off then back on every time they go to dart a Dino. Then log off and back on to their other account(s). Sounds more like a pain than fun to me.
I think it would be more like a family unit than anything. They would all capture the same Dino’s (if they played as a unit) and be able to trade with themselves. Only one of the players in that unit would reap all the benefits if they gave them all the ‘good’ DNA. Everyone else would just suffer by not leveling.
There is only one aspect I can see that would affect folks. That is placing in Tournament. But they still have no more advantage than anyone else in a generous Alliance with hard core players who target specific DNA and are willing to max out requests.
If it is not listed in the TOS as improper play, I see nothing wrong with it. If they update TOS to reflect otherwise, I will change my view.