They’re asking election administrators to use their data to purge voter registrations, which means names could be removed in a less public process than a formal voter challenge. The strategy could mean electors won’t be summoned in advance to defend their voting rights and the identities of those seeking to purge voters might not be routinely public.
“All we’re doing is a free service. Hey, this group of 500 people, or this group of 800 people said they moved. Maybe you should look into it,” I don’t see that being in bad faith or being an attack on the right to vote