Comparing the number of domains owned by Trump personally with the number owned by Clinton's campaign isn't measuring what it's alleged to measure.
For one thing, the Clintons personally owned ClintonEmail.com, not the campaign. If that was a derogatory name, it wouldn't have shown up in the count.
For another thing, the article doesn't count derogatory names owned by supporters. The Democratic Party has been supporting the Clintons since at least 1992, right? Hillary personally has been running for President since 2000. I bet the Democrats own a bunch of anti-Clinton and anti-Hillary specifically domains that they bought defensively. Those domains aren't measured in the count either.
ABC and DomainIQ picked a dumb way to measure something that gave them an excuse to bitch about Trump, and Slashdot fell for it.