Yeah, my bad. I must have been looking at Ellis' game log instead of the team's.
The point still stands. They knew what they had in Thompson before trading Ellis. They didn't trade Ellis with the hope of landing some draft pick who might do as well.
In Brand's case, he was a 20/10 guy from the start (with the Bulls). There just aren't that many 20/10 guys in the league (at the time specifically). To expect a guy with potential to actually match that 20/10 was a HUGE risk.