Except there is no evidence of this at all, just people comparing API and subscription pricing. The leaked financial info for OpenAI shows inference is profitable right now, though it does not show a distinction between subscription and API revenue... but if subscription revenue was so lossy, it would hard for total inference to still be profitable.
I believe this is the reason why we can even have this debate. Without this kind of competition we would not have these subsidies.
I just think that as of today, most people will not find a good reason to switch to GLM.