> At a two-day meeting this weekend, its board voted unanimously to allow its CEO Andrew Sullivan to enter into negotiations with Ethos Capital.
If you follow your link there it goes to the meeting on October 29 2019. Obviously such negotiations had been pretty much concluded before the announcement on Nov 13
As to ISOC Netherland's statement. it's from the Chair. Unlike ISOC, where there is sufficient transparency to see Board unanimity, ISOC Netherlands do not publish their minutes. There are 120+ other Chapters/SIGs, none of whom has issued a similar statement.