He was an informal adviser to Palin. He never “worked” for her.
You can review SARAHPAC’s filings yourself where you will see no payments made to him.
Here’s an excerpt from one of those articles you linked:
“Coale, in an interview with the Fix, described himself simply as a “friend” of the Alaska governor but acknowledged that he suggested she start a leadership PAC and helped her navigate through some of the questions surrounding her family that lingered after the campaign.”