Does anyone else think that it would be nice if you got an alert when someone gave you a lingot? Because I get one sometimes, I don't know where it came from and I can't thank the person who gave it to me.
I have just had the idea that someone could set up a Charity Support page on Duolingo (eg. Medicins Sans Frontiers, British Red Cross, PDSA etc.) where other users could give lingots if they support the charity. If you give lingots, you post "Support. _ lingots" and how many lingots you gave. The person with the page would give you back your lingots when you say you have donated money to that charity. Of course, it would be based on trust. - 15/10/15
This is a great point to bring up, often I see that a lingot seemingly appeared out of thin air. Usually when given a lingot you have no way of even knowing what post you recieved it on unless someone comments to inform you.
Unfortunately this likely falls into the category of small updates Duolingo doesn't have time for, but I would love to see it!
No, the bonus skills are also available on the web. You can get to the web version of the lingot store by clicking on the lingots indicator in the duolingo menu bar.
EDIT: I'm not sure if dutch has bonus skills though, I believe there are some language trees that don't.