If you want to convince people to use your spaced repetition software over Anki, you need to tell us what's so wrong with Anki that can't be fixed with plugins and that's worth $10 per year.
You want something for free? I'll give you something for free.
Anki absolutely can be improved. For new users, it's very confusing: having multiple decks, the separation between cards and notes, and the search interface are hard for new users.
Combine something that is simpler for new users with a demonstrably better algorithm and you might have a minimally viable product. But you need the product FIRST before you request money.
Give us something that we can run for one week and know that it's better than the free software that is Anki.
What excites me? Discovery. Finding significant patterns that no one recognized before. Predicting what's going to happen. My knowledge of computer science and statistics helps me discover new information from mounds of data.
To get my interest, express how much data science (especally statistics) are in your positions.
Streaming is constantly removing movies. There were fewer movies on Netflix streaming in 2022 than there were in 2015 (source: https://www.whats-on-netflix.com/news/netflixs-movie-library... ) And, according to the same source, Netflix has almost no movies from before 2000.
People might start looking to DVDs for more variety in their movies!
Look at Musk. He's CEO of six companies (or so), yet has time to run DOGE and constantly post on X.