Earl, I'm aware of how it works. The bleeder actually did the same thing but was unpredictable when the weather changed.
The bleeder valve changed because of density of air has different flow characteristic
s when the temp is different.
The MBC uses spring preload that isn't affected by temp.
I'm amazed Kenne Bell sold any of those goofy things. If all you wanted was a constant air leak from the wastegate hose, all it'd take is a sewing needle to put a hole in it.