I'm not a fan of Udacity, mainly because I paid them $800 for a single course (the first in the self-driving car series) and then they blocked all my access to the course content because I didn't finish the projects in the allotted time. I was hoping to finish later because my work schedule changed, but they were completely inflexible. I should have read the fine print. The course content was OK, but I don't think they have great policies.
I was frustrated with Udacity for the same reason, plus, their ostensible expertise is way overstated [1]. The entire reason I'm paying for a course is to be able to bounce arbitrary questions off experts. They provide people who are still in the fake-it-till-you-make-it stage that's so popular.
I lost access to some materials years ago too. It was a great program but I got hired and it no longer made sense to keep learning python. The switch to fixed terms is a bit off putting for me
