There are signs the same people might be behind Sinbad and Blender.io, Elliptic said. For example, before Sinbad was launched officially, its wallet received bitcoin from a wallet believed to be controlled by the operator of Blender. The founders might have been testing the new service, Elliptic suggested.
All of them are based on speculations, but there are no clear connections. I expected stronger evidence, but it is the tip of the thread for information that is difficult to be verified by ordinary people.
However, it does not seem that the Elliptic themselves are sure of the information because they did not give strong evidence, and all of them are attempts to link them to Russia or the context of what is happening in the war.