You can effectively own .com and a few other domains because you can swap registers and sue for control if someone else fucks up. Without that you are just at the mercy of the monopoly.
The difference is that Verisign's registry agreement with ICANN prohibits this kind of pricing shenanigans whereas Google's does not. Expect Verisign to try to renegotiate this when their agreement is up for renewal.
It’s a very different relationship with ICANN and domain name owners and has basically zero leverage to set prices beyond what it costs them to operate the service and have some reasonable profit.
Feels to me like it would be a lost cause depending on where you are.