Why would someone buy now when they might end up with CLAMS alone, whereas other holders will have CLAMs + Doogs
I have explained many times by now that the best way to create a new coin as a variant of an old coin
* is to set the cutoff date well in the future, and shortly before the actual launch of the second network (theoretically at the same time but practically a short interval might be preferable).
Anyone buying CLAM before the launch of the other coin would
also receive the new coin, so there is no loss of trust or value. Regardless of which coin thrives (or if by chance both do), anyone who bought in before the split would receive the same value.
This approach is economically the same as forking the chain with an update, without the technical risks associated with transactions that are portable between forks. The trade off is some extra effort needed to get buy in from exchanges and other participants to handle the split correctly, but this largely substitutes for the effort necessary to get consistent upgrades across the entire network for a fork. So in the end, especially for a smaller coin with only one exchange and a few sites, the extra effort seems small.
Once the new coin does exist, then both would trade independently and people can buy whichever one they like (or both or neither).
Of course, I've also said that anyone can create any coin at any time, or for that matter fork code and create update clients that fork the existing network if they want (as long as they can get people to use their code). So following my proposed procedure is not and can't be made mandatory. It just has the least negative effects all around.
* Except when it is clear that
virtually everyone prefers the variant in which case it is perfectly fine to make the change "in place" on the existing network.