alt Hacker NewsFrom section 4 [1]
> If distribution of object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place satisfies the requirement to distribute the source code, even though third parties are not compelled to copy the source along with the object code.
Similar clauses in Sec 6.
That section (and similar in section 6c) is not about the written offer of source code. The written offer of source code is instead covered in section 6c.