Some have "interoperability exceptions" - so if you have been granted a license to something, you can reuse it in different context (so for instance you could run Microsoft Office on WINE even if Microsoft's license forbids it).
Some have restrictions on redistribution (but the builds just using the blobs from the old filesystem are fine).
A lot of that is in the gray area, and for that very reason many builds don't actually redistribute blobs - they extract and reuse them live.
Some have "interoperability exceptions" - so if you have been granted a license to something, you can reuse it in different context (so for instance you could run Microsoft Office on WINE even if Microsoft's license forbids it).
Some have restrictions on redistribution (but the builds just using the blobs from the old filesystem are fine).
A lot of that is in the gray area, and for that very reason many builds don't actually redistribute blobs - they extract and reuse them live.