I would expect that given the potential traditional Nigerian folk belief offers to turn witchcraft into a profit centre, someone else will soon have followed the Pentecostals' lead, and the other people most likely to do it will be folks calling themselves Muslims (though belief in witches has never been part of Muslim doctrine).

The Pentecostals tried their damnedest to start an Ebola epidemic in Nigeria, and it was only one woman sacrificing her life that stopped them.

https://reliefweb.int/report/nigeria/iddr2016-how-nigeria-won-fight-against-ebola

There are many more like this:

https://www.health24.com/Medical/infectious-diseases/Ebola/Nigerian-pastor-declares-cure-for-Ebola-20140729

The Pentecostals I knew in NZ were quite happy to accept the compulsive gibberish of an acute schizophrenic as speaking in tongues and welcome him into the congregation. For a few months, the more he deteriorated the more the church thought he was advancing in the spiritual life.