At the end of 2019, Verisign had 158.8 million domains registered. At a price of $7.85/year, that's about $1.247 billion in expected revenue for 2020.
If we assume that the number of domains remains static forever, this change means that after the next price hike of 7%, they will see an additional $87.26 million of annual revenue.
By the end of the decade, given the same assumptions above, they will see an additional annual revenue of $895.28 million on top of their existing $1.247 billion.
All that extra money without providing any additional value to the customer. I'm sure many a celebration was had when they got the go-ahead to raise prices like this.