I couldn't answer your questions other then provide you will their posted email address from their web site, so that you might at least have a starting point to get information from the source.
If the name Arduino is copyrighted, aren't these companies breaking copyright laws?How would I tell that an Arduino board has the blessing of whomever Arduino is?
This topic has been discussed a lot prior in this forum. The Arduino firm have made all their software and hardware design 'open sourced' which allows anyone to free copy, distribute, and even sell boards made from that. It would seem to be perfectly legal to do that.
However the Arduino firm has copyrighted the name 'Arduino' and anyone naming their products as such would appear to be violating copyright laws. But in which countries such violation are actionable and enforceable I don't know.
Indeed many of the Asian sellers on e-bay do mislead by duplicating all the silk screening information including the arduino name, place of manufacture, etc. That has caused many here to not be willing to buy from such sellers, no matter what the cost advantage might be.
I am however a great supporters, and sometimes buyer, of 3rd party manufacturers that make either clone or 'improved' versions of an Arduino compatible design, as long as it's clear they are not misrepresenting.
What else can one do? The Arduino company itself is the one burdened with taking any enforcement action, the rest of us have no "legal standing".