Week 3 & 4 programming assignment and quiz locked

You are welcome to your opinion and welcome to express your opinion to Coursera, but that is not how things work in any of the paid Coursera courses I am familiar with. They give you access to the lectures and forums in perpetuity for no charge, but once you stop paying you lose access to anything that is behind the paywall. But it is a simple matter to download the assignments to your local machine. Running them on your local machine is not such a simple matter, since it involves exactly duplicating the versions of all the relevant packages, but just downloading them is simple. See the DLS FAQ Thread for a link to the instructions.