BS.
Page was a long time US IC "asset".
The warrant goes into some detail on the Buryakov case starting on page 13. It is also interesting how they describe Source #1 (Steele) and the way they fudged who paid for the ops research claiming it was a law firm and not mentioning the DNC or Hillary.
The Nunes report did a good job of describing what was in the FISA application. It is worth reading the application itself to see how the FBI with the assistance of the DNI and CIA lied and by omission, created a trumped up document to spy on the Trump campaign and transposition teams, as well as a sitting President. The redactions need to be removed to get the full picture. Trump should order it.