It is inevitable that most if not all mixers will be used for (or will be attempted to be used by criminals for) nefarious purposes but when headlines such as "The world’s most prolific crypto thieves have used Sinbad.io to launder tens of millions" are associated with a brand it means their days are numbered.
Pointing at Sinbad.io is also referring to other mixer service providers. The prediction that it will be the next to be shut down by law enforcement agencies is mere speculation, who knows another one might be the next because they offer almost the same service. After all, nobody expected the sudden closure of the almighty Chipmixer because no publication predicted it. We can not doubt that these mixer services are needed to promote privacy and limit centralization. But like other genuine services, criminals will always capitalize on this wonderful service to carry out their evil activities. Relating Sinbad with Blender is mere rumors that have not been proven even the website publication used the word "may", which means that they are not sure that Sinbad is an offshoot of Blender.