1. Closed-source javascript is not a thing, and Ghostery's code is very readable.

2. Technically, anything is subject to influence by third parties, but I'm quite certain you possess zero evidence that Ghostery is actually influenced by advertisers. Implying that Ghostery might do something nefarious at the behest of advertisers (based on nothing but personal paranoia) seems maliciously disinformational.

3. Ghostrank is opt-in by default. You have to intentionally check a box that plainly says you agree to send "anonymous statistical data" to them.