LB’S UPDATE 4/15/18: Looks like Amazon has thrown in the towel on even pretending to be considering work from newbies. Here’s part of an email on the subject that I got yesterday:
Hi Larry,
As we have grown and evolved over the last several years, we are making changes to our website and closing our open call for script and concept submissions. As of April 13, 2018, we are no longer accepting submissions. Submissions received will continue to be reviewed and evaluated by Amazon Studios and will be available on our website until June 30, 2018. Thank you all for your contributions.