It is just newly launched website in which there is no much contents! How could you say it it rank 4/10? There is nearly no traffic yet! I doubt any one will be interested to post there unless the articles are paid for!
its easy to check google pagerank value
try
https://checkpagerank.net/index.phpyes Blog Newly but domain is already used for an old website
There is a possibility that it will be penalize on the next page rank update if the old content from an old site are all deleted,Google usualy penalize site that got it's ranking from buying an old domain