Private Whois, Email, Hosting, SSL, etc offered as up-sells
Article actually addresses this:
"With a good idea on how to build a more secure registrar we asked our customers what they hated about their current registrar. Two phrases kept coming up: "bait and switch" and “endless upsell.”"
I anticipate consolidation, most likely around providers like Cloudflare, Google, and Amazon, where their costs are minimal and it’s a loss leader.