FB allows a custom audience to be built from identifiers like email, phone, etc. They claim it is hashed before use so they never see the raw data (not sure if they mean hashed client side or server side though).
This will rely on a user's FB account having the same email as used for BB, which could be unlikely in the case a company is paying for it. But it should work well enough for retail targeting.
All they say is they don't learn anything new about your customers. I would take that statement with a lot of caution. For one, they should know that I am a bb customer now. Having a graph of all the companies and products I use is huge PI.
> They claim it is hashed before use so they never see the raw data
If they can match hash data with real data, they can know more than they did before. Depending on what algorithm they use for hashing (no mention of it), they could be using a similarity hash so that will minimize changes if there are minor differences in the dataset.
Let's say I find a profile through comparing hash of email to email in Facebook's database. I can then compare additional information to see if a customer has provided incorrect information to Facebook as a user. Facebook could check if my address is similar to online shopping sites I use and if not, flag the account.
Yeah there is a lot of room to hide in the gaps of what they said.
Still, main point is you only need an identifier and none of the other data Facebook has. Pixels are not required for this as noted in the original comment, they probably have enough in the account details already.
This will rely on a user's FB account having the same email as used for BB, which could be unlikely in the case a company is paying for it. But it should work well enough for retail targeting.
https://www.facebook.com/business/help/341425252616329?id=24...