I'm sure guys who have paid for the enterprise version of BitBucket would rather not have to pay $60 for every developer for BeyondCompare on top of what they pay for BitBucket
Yes, nobody would rather pay for anything though - so what kind of argument is that really? It's like saying "Who would pay extra for higher quality tools?" - the answer is: Lots of people would.
Personally, I pay for the best tools because they're worth the money. For that tool in particular, I paid $60 over 3 or 4 years ago. It's practically nothing compared to some of the other tools that we use.