> do you actively scrutinize and examine the key people of every service and product you use

No.

> is it just a reflexive change of footing whenever you happen upon news like this

Yes.

> do you really switch

Yes.

What is the implication here? That because I did not know that a percentage of the money I give a company went towards supporting a party whose I that I find disgusting, I should keep supporting them now that I do know?