I agree - I really like it and I'm learning a lot. However, i'm losing motivation due to the lengthy queue.
Task 6 currently has a two month wait. Given that you may have to submit multiple times to get feedback and fix mistakes, you're talking a significant part of a year to get a single task done.
I understand there's a massively unexpected surge of users, but I'd happily donate to help improve infrastructure (if donations were ever available)