If we ignore the problems with peeping, then why wouldn't it be good? It was written above that it would be good if the number of pool participants turned out to be above 20, but if you introduce the possibility of participation from several accounts, then I am sure that the number of players will be more than 30 for sure. If the same fee is paid for each account, then this does not affect the economy in any way, but it increases the prizes.
Multi accounting introduces a whole plethora of problems and I am not keen to tackle them. For instance you decide to enter with 2 accounts, I decide to enter with 5, and couple of more players decide to enter with 3 or 4. You are not feeling good since somebody is having more accounts then you. Half of the pool that plays single account feels like utter shit and they don't sign up next season.
Better to keep it simple and on equal footing for everybody.
Yes, I understand the cons, but every minus probably has a plus - if I participate with one account and someone with five, then maybe I will take his money, while he can only take a small amount from me if he is lucky. In general, I understand that it is necessary to leave everything as it is, this is just a reasoning, I would be interested to see how different forecasting strategies work.