The problem with OMDb is that it's not updated very frequently as the ratings don't come from IMDb directly but from various other sources. Especially for new movies that means that it often has ratings that are way higher than on IMDb. It also happens that less popular movies are on IMDb but not OMDb.
That’s the thing, they aren’t scraping IMDb, they scrape other sources that have the IMDb ratings from what I remember. Directly scraping IMDb is not a good idea if you make money off it.
I don't think the distinction matters if imdb wanted you to stop offering their ratings in your commercial api.
I certainly expect that this project is too small of a fish for imdb to care either way. It's more of a curiosity for me since I always love the simplicity of an API as a business.
You can do anything until you get caught. However, I think there are many companies that exist in the realm of "data aggregation", likely walk a fine line though.
