I'm good friends with one of the founders of Skitch. He effectively got less than nothing for that sale. It was an acqui-hire with vesting stock valued in the several $million, but when he couldn't handle working in the big corporate environment at Evernote, he had to leave, and lost his stock with zero remuneration. He couldn't even pay off the debts he'd incurred over the years building Skitch. Terrible outcome for him, as well as the product. So sad.
True for accounts you follow in Tweetbot, but unfortunately you can't disable retweets for individual members of a list inside Tweetbot. I really wish you could.