Lucrative online seminars (in english) venue/sites? :)

[KyriakosCH]

I am too lazy, and probably won't manage to create one, but online seminars (not in english) are by now my main source of revenue.
So I thought of asking people here if they know of decent sites where one can host such, and hope to make some cash
I was thinking of niche seminars, for example one on the life and work of Franz Kafka.

[Cassiebsg]

Maybe Skillshare ?