The AAU stuff is a dead giveaway that none of this is true.
I have no doubt that FSU wants into the B1G. I also think the B1G would now want FSU to join, as opposed to a couple years ago.
I have huge doubts that AAU membership is at all a concern of the B1G in any of this.
Look at the way Nebraska's AAU membership was treated by the B1G. When it comes to bonafide football schools like Nebraska and Florida State, the B1G doesn't give a damn about AAU membership. It's practically irrelevant.
That's why the Dude's info is more than a little fishy.
Agree that AAU membership isn't a deciding factor as far as invitations, but it may be important for publicity/propaganda/negotiating purposes on both ends.
In order for the B1G to win UNC and UVa away from the SEC, they need to have academic standards that don't permit them to take Va Tech and NC State. That way the way to maximize money into NC/Va is Va Tech + NC State to SEC, UNC and UVa to B1G, and the B1G gets state legislators and other powers backing its preference. If the B1G doesn't have any academic standards, then the reverse, UNC+UVa to SEC and NC State+ VaTech to B1G, becomes plausible and UNC and UVa may get their choice. They might favor the SEC.
FSU also has to sell a switch to a far-flung northern conference to its constituencies. If they can claim they're upgrading research and academics by moving to the B1G, that defuses objections.
Once realignment is finished, they can drop the AAU charade.