I understand this is an accepted accounting practice.
My main point was that streaming/subscription services rely on companies continuing to spend to maintain customers, and when that spending is on credit there are limits to how long you can keep that up.
I don't have an opinion either way on what is sustainable for a streaming service. It's all relatively new types of businesses.
Netflix is banking on growth continuing to support their spend, though, since they're planning on spending $17 billion or more this year alone to develop content. Can't say who is right in this situation.
I will say though, that content does matter in terms of which subs people are going to shell out for. That's why I believe MS also has this strategy in mind with their recent purchases of studios and Gamepass and all that which is being discussed.
Invest to grow your user base, get the content that makes them join and want to stay, and continue to grow your business doing this until it hits that critical mass and suddenly you're raking in the money monthly/yearly.