Sorry, rules have changed: you'll get my_rating*20-100, so still up to Ṁ100 per movie, but you get punished for recommending something that results in a bad experience for me. :))
Ṁ5 for reminding me of a movie i've watched but haven't rated.
0 for a movie i don't watch or it's already in my watchlist.
-Ṁ5 for a movie that i have already rated.
I'll add more bounty if needed. These are my imdb ratings, i don't use anything else - https://www.imdb.com/user/ur49857149/ratings