A Shaikh charges a fee of R150 per person for a lecture on Islam which he held in a public hall.

Answer

The sheikh, we understand, is not being paid by an employer who hires someone to deliver lectures. This sheikh charges the individual members of the audience a fee. Among the signs of Qiyaamah according to the Hadith is that people will pursue the world with deeds of the Aakhirah. A lecture on Islam is a deed of the Aakhirah. This sheikh is making money and pursuing a haraam agenda with the deed of the Aakhirah. Hence he is a manifestation of the materialization of Rasulullah's prediction. The fees charged are haraam.