This is indeed a very interesting topic.
The majority of programs do have the clause that you may not bid on their brand name, and I do concur that this makes sense for them.
However, like you described, this is not always under the control of the bidder.
I think enforcement of these terms needs to be reasonable. I don’t think affs can be expected to excempt every single word and word combination of the brand name.
If so, the brand needs to send you a complete list of what all may be prohibited.