I discovered an English site to make money with Twitter by inserting paid advertising.
There is also a page where You can enter a Twitter user name
and get an estimation of income per month.
I have 2 Twitter accounts, one for English, one for German.
$29.47 for 267 followers at my German version
$3.13 for 160 followers at my English version
But both accounts tweet about the same themes, only the language is different.