If a host declines a sitter’s application- then they are prompted by the system that they can choose ( optional ) to add a personal message .
However , if a host has had a number of suitable applications, when they offer the sit to one of the applicants - no decline message goes out … it is when that sitter presses “Accept” that an auto decline message goes out to all the other sitters who applied . This could be immediately or days later - it’s whenever the sitter presses “Accept” .
Most hosts probably don’t even know that this is what happens . Hence no message from them because the “system “ has auto declined all the other applicants .