[Dawn06]

Preregister improvement"
May I suggest BBO changes settings -
Definitely more convenient (no need to be online at the same time##) and a
time saver as can Logon in own time.

Player's pre register "anytime" up to an hour before start of play
Partner accepts "anytime" up to an hour before start of play.

[TylerE]

Player A and B both invite player C.

What happens?

[pilowsky]

This is a great idea.
What OP is suggesting is that it is possible to register with a partner who is not online and for that partner to come in later and attach their registration.
This system is implemented successfully on other sites. On Stepbridge for example I can register days in advance and my partner then registers at leisure. The registration is only finally accepted by the system when both players have registered.
At present this doesn't work on BB because you cannot go to a partnership desk and register with your partners name as a 'placeholder' so that they can come in later and register.

At the moment you both must be online at the same time. For players in the online community, this can be quite bothersome.

Implementing the change would likely increase the number of participants.

OP is unlikely to be suggesting that they spray invites to multiple people and hope for a pickup partner.

Another option that is available elsewhere is to register without a partner and the Director then allocates you one 5 minutes prior to start.
Again money to be made. And enjoyment to be had.

Simple as A,B and C. Well, one of A or B will just have to watch.