1\ PTS holders with be honored for all following DACs at ratio 1:1, it has been written in white paper and will never be changed
2\ MMC is a new altcoin maintained by Freetrade, but it is not a DAC of 3I, the 10:1 ratio was determined by the author. I heard that he maintained the source code of PTS also, so I guess that why he wanted to honor the holders of PTS.
3\ Before every announcement of new DAC, for sure you need to put all your PTS in local wallet. But if you pay attention to this forum, you will know when the new DAC will be released, it is well planned.
4\ You can redeem your MMC at anytime if you had PTS in your local wallet at block 32000.
5\ Since the most exciting DAC--BTS is still in development,not to mention many other amazing DACs. So you still have a lot of chances to benefit from the following redemption of DAC, if you hold PTS since now.
Hope it helps.