Comment by o11c

Most licenses, even permissive ones, do require attribution of some sort, which in theory should move the SEO to the original.

The problem is that:

1. BSD-4-clause included an advertising clause and that was considered burdensome (similarly, GFDL-with-invariant-clauses is forbidden by e.g. Debian), so the attribution only has to remain somewhere.

2. Embedded-in-an-archive links probably don't count much for SEO. Some aspects of GPL and/or AGPL can help in some circumstances ("appropriate legal notices"), but automated AGPL requirement satisfaction in the presence of forks can actually be pretty tricky to implement even among good actors.

3. even though it's illegal, stripping of license headers remains very common