1. Twitter was and still is a commercial product, not to mention publicly traded. Buying and selling it is completely fine and ordinary. It's nothing to feel furious about, especially if you aren't going to put up a competing offer.
2. Wouldn't you (and 99% of people) also spend money to amplify your opinions far and wide if you had such money? Hell, the entire reason most people use social media is because they want to amplify their opinions far and wide.