And how can I invest to 4minutewarning.
If you wish to send money to Ravager, they left us this message above: "Ravager is free. If you enjoyed it, you are welcome to pop over to Patreon or SubscribeStar to help keep its development going, or to wishlist us on Steam if you are looking forward to the final result!"
As for sending them a donation through itch.io here... they seemed to have disabled that feature for some reason. Usually when clicking on "Download" the user would be prompt if they would also like to send a donation or just be taken straight to the downloads. This however is not the case here... It just starts downloading instead. So unfortunately at this time this method does not seem possible. I as well was hoping to send money from here.