A naton which had been occupied and gave all it still had in resources to the UK/USA is a state which was "on the [fucking] sidelines"??!! Have you no fucking decency! It is not WW1 we're talking about. According to your obvious standard Poland sat out the war just as much: its land occupied, its armies destroyed, its navy destroyed, its air force destroyed, its natural resources captured, and all that remained were individuals whom managed to get out. The Netherlands gave its military remnants, remaining territories and remaining free personnel over to the USA and the UK.
Suriname, Curaçao, Bonnaire, Aruba, Saba, Sint Eustatius, and Sint Maarten had been occupied by the USA even if not in name from the moment the Germans invaded the Netherlands proper. The DEI remained 'independent' in name only and functioned as directed by the British and later the USA only to be concorred in 1941 itself with all Dutch or rather all white civillians locked up in Japanese interment camps, captured Dutch soldiers were interned and turned into slaves just like the French, British (Australian etc etc incluis) and American soldiers. And now you tell me that that equals to "sitting out the war"!?