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Out of interest, why do developers use the SDK and send these events?

Is it just for ‘sign in with Facebook’? I’m surprised at the specificity of the event-data; do they offer an analytics interface like for GA?

Do they give you any cash or other benefits for all the data?

I’m very surprised that companies like banks are including it, when I’d assume they have their own analytics and identity systems.

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They have analytics like GA. In particular, they track conversions, etc... So if a company runs an ad on FB, putting the FB analytics on their site and in their apps lets them tracking the effectiveness of the ad they ran.

There is nothing nefarious from the company other than they are trying to figure out what their FB ad spend is worth. FB OTOH is probably using the data for tons of other reasons. Are those reasons dissimilar from GA/Google? I do not know.

> There is nothing nefarious from the company other than they are trying to figure out what their FB ad spend is worth.

I call exposing users to the likes of Facebook, Google, etc. "nefarious" all on its own. At the very least, it's treating users with a degree of contempt.

If your users "sign in with FB", you know their user ID (or at least an identifier), that you can then use to retarget ads to those people.

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