I dunno how the responsiveness thing is worked out, but just letting you know that in my case it is broken - I reply to every email I get, yet my rate is at 33%. In general I don't log onto the site - I just reply to the email - as it is quicker - and it always used to work, but maybe that has changed and you have to go through the site now, or some emails get filtered out or something like that.
Cheers adrian
FP Promote:
Not on Front Page
Check here..
https://www.warmshowers.org/user/24595/messages/unanswered
it will show you all messages than need to re replied to get you responsiveness up to 100%.