Business and Politics

I know that at the head of every business, whether large or small, are people that have their own ideas on politics. I expect these people to have political leanings towards those that support policies that better their businesses or help to achieve their business's goals.
Many businesses quietly give money to politicians, others take very outright and open stances for parties or individuals and take the chance of alienating nearly half of the voting public by contributing to politicians that will vote against the policies their potential customers might favor. It always amazes me that business owners are willing to do that.

Are there companies or businesses that you refuse to do business with based on their politics and the political party or candidates that they choose to finance?

Where do you draw the line?
If you travel, you need to patronize a major airline.
If you drive, you need to buy gas from an oil company.
Most big businesses tend to be on the political right.
Most small businesses tend to cost a little more.
Do you boycott one company for their anti-LGBQT+ policies, but patronize another politically right company because you really like their product?
How do you choose?
Does boycotting a company have any impact on the company or just make you feel better about where your money may end up?

Just curious.

John