I can't say about all of them, but the RiF developer clarified it for the verge, taken from this link :
If RIF is still working for you when you’re logged out, here’s why.
“When users are logged out, the app is still working because it does not use the OAuth client credentials while logged out,” developer Andrew Shu tells The Verge in an email. However, he expects that the app will stop working in this way soon.