Toast... you are serving an excellent example of how free market forces will apply. In the interest of getting as many adopters as possible in your new chains I would suggest that there will be more individuals involved in BitShares XT than AGS and PTS and thus you can achieve a wider network effect by honoring those positions after they have proven the concept.
The launching of a clone requires more than just releasing the software, it requires servers, partnerships with exchanges, etc.
Market depth is very important to the functioning of BitShares X so if you fragment it too quickly many of your early clones will probably have trouble as there is only so much energy in the market able to feed these DACs.
I like the fact that the market will decide between AGS/PTS and XTS honoring...