I have not read Tintin in Congo but apparently Tintin is (or was) quite popular in the Democratic Republic of the Congo according to a friend of mine who grew up in the DRC. Wikipedia also mentions it was popular in Francophone Africa, backing up what my he told me.

My friend is a big fan of Tintin and has a lot of really nice hand carved large wooden figurines of the characters and vehicles from the series.

I would normally think these figurines would be made for tourists but I don't think there is much of a tourist trade in the DRC. These figurines would sell for a lot of money in the USA or Europe.