If you're planning to use Render's free plans as an alternative to Heroku, then you should know about this: "Render’s free database plan allows you to run a PostgreSQL database that automatically expires 90 days after creation. Free databases are suspended after 90 days (unless they are upgraded to a paid plan), and are no longer reachable at this point." so as a workaround, you should keep creating free databases after every 90 days.
If subject A's and subject B's synthesis created a new thing C,
wouldn't he then be considered an expert in C, solely because there's no-one else doing what he's doing? In this way you could be an expert in many things you yourself pioneered... Or you could just create a new game and be expert at that.
Look at this user for example, he was posting for a year and guess what, for a year of posting, all of his submissions are dead, without him knowing, only the first 9 submissions from 2021 that are visible, only 9 from ~58 and he keeps posting because he don't know that his submissions are not visible.