Both features, global tables and automatic backups, seem like automation of features you could build yourself.

Global tables use DynamoDB Streams put items from Table A to Table B using conditional put (A Timestamp > B Timestamp).

Automated backup may be DynamoDB Streams or an automated setup of Datapipelines export to s3.

http://docs.aws.amazon.com/datapipeline/latest/DeveloperGuid...