When I make a report of criminal behavior to a webhost/registrar I expect them to investigate and take action based on evidence.
NameSilo tries to hide reports of phishing by ignore communications to their abuse contact info and forcing you to use their internal form system so that you cannot prove your communication to them regarding the abuse and they can ignore it as long as they want.
I've included an image where you can see their response to a complaint of criminal activity, they say "we cannot simply take reports at face value " This sounds reasonable at first glance; except then if you think about it you realize this also applies when you submit their form. Or you know they could look at the submitted proof, ask for more proof, aske their customer, or investigate if they were not directly profiting from their behavior.