Not for Android directly (tho very encouraged via monopoly bcs Google gets all your data via playservices + profits via playstore), but for other proprietary spyshit (eg preinstalled Facebook app, sometimes users can't even uninstall the app, unless they fiddle with adb) & additionally in cases of megacorps manufacturers get further revenue from users via their own telemetry shit (eg Samsung collects data from your environment that Google misses & sells it to data brokers).
(Why else would a random company preinstall so much third party shit? Ofc they don't do it for free. And everyone is interested in spyphone quantity bcs more users means more data. Much like gaming consoles & printers are kinda subsidized/can sell at a manufacturing loss.)

So sellers of hardware without for-profit stores & no further revenue streams from spying on you have to charge users clients all the cost upfront on the sticker price.
(Not to be confused with the fact that spy-free phones don't have such economies of scale as eg Samsung so their costs per unit are noticeably higher bcs of that too.)