Big dataed means being the target of big data, as doing a Google search for something and then being sent targeted ads for that thing for a month.

“被大数据”（big dataed）指沦为大数据的追踪目标，比如在谷歌上搜了个什么事，之后的一个月你都会收到根据这项搜索对你投放的广告。

For example:

I got big dataed recently. I bought a plane ticket online last month, and now I am receiving all these sales ads on almost every page I visit.

我最近被大数据了。我上月在网上买了张机票，结果现在无论上哪个网站，都能收到这些机票促销广告。