The reason some remove device sales from the Roku sales to get p/s ratios is this whole p/s ratio metric is being used now to compare SaaS companies that have 80% or higher GP.
So to compare Okta’s p/s ratio with Roku, you may as well be adding ford into the mix. They all have drastically different profit margins so shouldn’t be compared based on their sales.
Roku’s platform margins may go to the mid-high fifties over time so even they are not comparable to a SaaS company.