License proliferation leads to complicated license compatibility relationships [1].
Imagine someone wanted to, say, provide native support in GNUradio - as has been done for the RTL-SDR. It's impossible unless you relicense one or the other.
Of course, the code's being given away for free; you could argue one shouldn't look a gift horse in the mouth. And it's quite possible no-one would attempt such a merge even if it was permitted by the license.
Imagine someone wanted to, say, provide native support in GNUradio - as has been done for the RTL-SDR. It's impossible unless you relicense one or the other.
Of course, the code's being given away for free; you could argue one shouldn't look a gift horse in the mouth. And it's quite possible no-one would attempt such a merge even if it was permitted by the license.
[1] https://en.wikipedia.org/wiki/License_proliferation#License_...