Hey joevt and robespeirre, thanks for your time and the additional detailed input. Again, not all here are concerned with MIDI and DAW, etc. Initially this was intended for those tired of continuously fumbling around attempting to attach basic USB devices to the backside of their machines. And oddly enough, I did find one (powered) hub that I already had here which MOTU recommended way back when / then. (See inserted image, bottom.)

Both the two Targus USB 2.0 hubs that I have use Genesys Logic GL850G controllers.

Maybe the recently ordered, newer, ACH215 Targus 7-port USB 2.0 hub will have the GL854G?
[Nope. Changed from Genesys Logic to TERMINUS TECHNOLOGY INC. v1.11] 
Also have an Entrega, “MacHub4U” - recommended by MOTU.

Can’t find the actual specs for the Entrega and I’m not likely to use USB Prober for these hubs primarily intended for sneaker-net thumb drives. However again, information good to know for those more MIDI and DAW-inclined among us.
AND…
I don't know why USB Prober.app says "Multi TT Hub configured as a Single TT Hub" instead of just "Single TT Hub".
Could be that some or all of those hub controllers noted as Multi TT on the Genesys Logic website could also be “
Multi TT Hub configured as a Single TT Hub”?
Caveat Emptor, indeed!