[hayksaakian]

It depends on what permissions they ask of you. If they don't ask for any, then they might not even get your email address. Typically signing up for a service manually requires you to provide more personal info than they may otherwise get via FB or Google. With FB there are many permissions that you can 'skip' albeit this isn't intuitive.

[jman1]

What happens to my data on the website when I revoke my permissions from google/Facebook ?

[hayksaakian]

Iirc they're supposed to delete it, but whether they do depends on them.

[andrewhillman]

FB doesn't delete any info - period. They seem to archive everything. For example, if you post a photo, then delete it, they still archive it. Delete to you is Archive to them. I have been doing small tests and this is what I have found.

[icebraining]

Parent(s) are talking about the websites that get data from Facebook, not Facebook itself.