That there are a lot of strange people in the game, I like to believe that. And that some players like you play 1 round full-time to get that No. 1 spot. I know that too. But you can't keep that up for several rounds to play that way.
It is difficult to see who and how many are behind 1 account. But suppose there is an account shared to play 24/7. Railnation does not check whether more accounts are active on the same IP address on the same server. Because you see that a lot on servers. Family or a couple who both play Railnation, and also log into each other's account.
But that something is difficult to control doesn't have to mean just allowing it there. No action is even taken by Railnation to tackle conspicuous cheaters. (in any form of cheating)
But in theory we can now make an association of 25 accounts according to the rules. You still arrange 25 to 50 people and you can have your association and accounts play around with 2 to 3 people per account 24/7.