I was under the impression that PTS entitled the holder to a stake in ALL future DAC's
PTS entitles you shares to ALL future DACs as long as you keep them in your wallet during the relevant snapshots or if the exchange that has them during the snapshot honors you with those shares.
I'd be upset if Bter received future 'coins' from my original PTS that they didn't pass on to me.
No one has yet received any other shares from future "coins" since the snapshot for those "coins" (DNS and Vote) is on the 21st August.
BTER is one of the exchanges that honored the 28th Feb snapshot and therefore you have received your BTSX from that snapshot on the specific day.
BTER said that it will honor the current snapshot of the 21st August. This means that if you keep your PTS on BTER during the snapshot you will receive the relevant Vote and DNS shares upon release. Unless of course BTER defaults by then or for some reason decide not to honor you with those shares.
If they're worthless, does that mean pre Feb 28 PTS are worthless to people who had them in their own wallets on the snapshot date?
All that matters is how many PTS people had in their wallets at the specific time of the 28th Feb snapshot. It doesn't matter how much you had one minute earlier or 1 minute after the snapshot. Those people who had their PTS in their wallet at the time of the snapshot are entitled to BTSX which they can claim on Bitshares X platform. Same applies for the PTS held on BTER during the snapshot (you did receive your BTSX in BTER because you had PTS there at the time of the snapshot)
Please let me know if something is not clear so I can further elaborate.
P.S the 21st August is not the last snapshot. There will be other snapshots days not yet announced for Lotto, music, me, insurance etc..