QuasiUnaFantasia
RIP I think the second is definitely true for some manufacturers, but it can't be true for them all. For example, Steinway refuses to sell their stencils to registered piano technicians as described in ... so it would be very strange that they forbade the use of their trademark to those that repair their product following their guidelines, but allow such use to Pianoteq, without checking it and deeming it at least okay.
Those piano technicians, selling used Steinway piano's are in direct competition with Steinway. Modartt does not compete with Steinway, nor do any of the other VI makers, so Steinway probably are not loosing any sleep over their products carrying the Steinway name. Instead they get some advertising directed towards mostly young people, who may one day be wealthy enough to upgrade to an acoustic.
Anyway, that is how I see it.