Sorry I wasn't around LTB, but you saw some post how it all breaks down.
Far as I can remember, only once that I vaguely recall have TWO teams jumped. Wait, maybe two. Was 07 a double jump?
So basically, the Bucks lock up the worst record, they are GUARANTEED nothing worse than #4. (3 teams jumping them)
If one teams jumps them, they get the 2.
Two teams, they get 3, so on and so on.
So it works both ways in terms of what we want. We can end up with 4th worst record, and still get a top 3 pick. OR, we could get 4th worst record, and still get 7th pick.
Flip to that is, we could get 8th worst record, and somehow jump into the top 3 (rare tho)
What we are basically doing by "tanking" is strengthening our position regardless of lottery. Even if 3 teams jumped us, we stay in the 4-5-6 mix, rather than getting dropped from 8 to 10-11.
And of course, with the more lottery balls, the better odds of us jumping from a 4, to a 2, or even the #1.