It’s now possible to get non-aggregatable metrics on Account level through the LinkedIn connector!
This will give you the metrics Reach, Frequency, Impressions and the dimensions Account and Account ID. All you need to do is connect a new source choosing the metric type "Non-Aggregatable Metrics" and the level "Account". 
Read more about our LinkedIn connector in our knowledge base article "What data can I get from LinkedIn?"
If you want to learn more about non-aggregatable metrics in Funnel check out "What are non-aggregatable metrics?"