There are levels to emotion. I postulate that there comes a point where language is required to achieve a higher state of emotion.
For example remorse. It’s required understanding one is able to cause others harm. Can you reasonable state this is an innate emotion? I would strongly argue it requires understanding of cause and effect that requires verbal communication to understand.
With animals we train them with reinforcement techniques. Which children we do the same but continue to expand upon it on with verbal reasoning
It may not be monthly but there are companies that will monitor your levels and schedule refills as needed. If you’re getting refilled per month you probably need a bigger tank. Most people are using propane for heating and don’t need it refilled in the summer.
There are also options to spread the cost over the year so you’re making payments each month. That is sort of a subscription but when I think subscription I think of a service you’re charged for whether you use it or not and not financing.