Essentially the idea is you authenticate yourself with this third-party site.

When visitors click those ads, the third-party site gets a share in the revenues.

We also do not use personal information made available by the user to these third-party sites.

That means fewer discounts may be available when they do sell to third-party sites.

Many people, after initially signing up via Twitter.com, then continue to access the service through a range of these other third-party sites.

And so my feeling is I've never done a scan through some third-party site to, like, have it look at all my drivers.

The third-party sites can warn you whether your use is likely to increase, based on the experiences of other consumers who made the same switch.

Well, being taken there by a third-party site is very similar to being offered software which you didn't go seeking.

Is it convenient to use a third-party site to authenticate?

And then you bounce back to the third-party site.