That article is about why employers shouldn't tell their employees who to vote for. This is telling their customers who to vote for. And even then the context matters I think.
If the leadership of a company is willing to send an email like this to all of their customers, it doesn't seem unreasonable to believe that the employees are being influenced, which is the core component of that article:
When the Founders set about designing the world’s first democracy, they were particularly concerned that employees might be subject to the undue influence of those who controlled their economic fate. “In the main,” Alexander Hamilton warned, “power over a man’s support is power over his will.” Constitutional author Gouverneur Morris likewise worried that those who “receive their bread from their employer” would be pressured to “sell [their votes] to the rich.”