As most of you know this website has been a help to many people. This is not new. I am looking into it if we can add a donations button on the main screen. This will help Duolingo to make this website even better than it already is.
There should be an input for how much you want to donate. There must be a minimum though. This minimum amount should be around at least $1.00 just so people are not allowed to spam 1 cent donations (like other websites have had happen). Maximum amount can be whatever Admin choose it to be.
Thank you and we hope to see this happen in the near future.
I completely agree with the comments above. While it is a free resource, I'm sure there's more than a few of us who both would like to support Duo, and have the resources to do so.
I don't have a full time job anymore, but could still manage a small donation to support something we get so much value from, while appreciating that any small donation I could make, also helps to keep the resource free for others who aren't in a position to do so..
I don't know what problems might be associated with this, and how it may affect the Duolingo image, but on the surface I think this is a great idea. If not on the main screen, then in one of the drop down boxes so it is not so in the face of people who might be offended with the suggestion.