Level 8 means $125K at total list price, so anything up to around $90K to the author. While we won’t go into specifics of the OP, that amount could be made over several years, several months, or in very rare cases, several weeks.
Earnings vary considerably based on the category, how many items people have, how much work they put in and most importantly… the quality and desirability of their content.
However, the most important thing that differentiates contracted employment and the selling of digital good/passive income… if you work every hour under the sun for a year and only make $10 to $20K, you’ll probably still get an additional $10 to 20K the following year even if you don’t do any work at all. Not to mention the money you’ll also get in year three, four, five etc etc. It will start drop over time if you’re not putting the work in to maintain your portfolio, but a week of work now could make you thousands or tens of thousands of dollars over the coming years.