Hello,
My daily devices are setup with LineageOS using microG.
In this setup It's possible to use bought PlayStore apps, the general licence check is implemented as far as the device is registered with a valid Google account.
In app purchases instead are not (officially) supported by microG.
That the reason why I'm forced to use some other automation app.
Saying this, I WOULD REALLY APPRECIATE A SEPARATE PAID (LICENCE) APP besides the already implemented in app purchases. Naturally a separate bought sideloaded apk is also appreciated.