Item by item: 1. This article doesn't say that Twitter (the company) has a liberal bias. It says that Twitter users lean left. 2. The article says absolutely

Item by item: 1. This article doesn't say that Twitter (the company) has a liberal bias. It says that Twitter users lean left. 2. The article says absolutely nothing about this, and you haven't provided any evidence. This is pure conjecture. 3. Twitter users aren't forced to follow anyone in particular. There are plenty of timelines filled with conversations that look and sound like right wing "echo chambers", centrist "echo chambers", etc.