Before, all players entering a pot put in an equal amount, either in blinds, antes and/or bets. Until someone is all-in for an amount less than someone else.studog;417112 wroteIt's not a new way. There's no fundamental difference (beyond who pays how much) between SB+BB, SB+BB+Antes-from-everyone, SB+BB+BBA, any other arrangement. Chips that are forced in are forced in. They don't come from nowhere, they come from players' starting stacks.
Utilizing the Big Blind Ante creates some new scenarios that need to be realized and accounted for. Like if a player is short and cannot cover both the BB and the BBA, which is posted first?? According to TDA, BBA is posted first, which can create a situation in which a player, AT BEST, can only break even and not profit from a winning hand. That never exsisted before BBA came to be. But it is also a consequence of using this new format. As such, other things may need to change as well, such as if a player is at risk of being eliminated that player must be considered a shorter stack.
None of this is written in stone as of yet. I do not think it was brought up at the last TDA Summit last summer. But I have discussed it with reps from WPT and it is being forwarded to Matt Savage for review. I hope it is something that can be clarified, one way or the other.