Weku is a platform that was forked from steemit. They have been around for a couple of weeks now and many users are already there turning to whales and accumulating Weku power. The truth is Weku cannot surpass Steemit.
Weku only have a witness which is the developer and recently the site went down for hours and on returning all transactions conducted were gone. This is a bad thing for a new platform. Weku is not fully decentralised and that could be a stumbling block in their growth.