Well, a lot of people say that Pablo the Mexican engaged in such. There's a history in Latin America for people to combine various occultic practices with Catholicism ... such as in a "Santeria" framework, with the "Saint Death" junk, or some Mayan elements, etc.
Apart from that, did you read the link in the OP, where the article names the names ... Kwaknewski and others?
The Pablo phenomenon is probably something that he always did, even before he (falsely) converted to Traditionalism.
It is true that Latin Americans will mix Catholicism with African style witchcraft and Pagan beliefs and practices, but all the Traditionalists I know are well aware that this is a serious sin. There are a lot of Novus Ordo folks who like to get things mixed up, but I have seen no Traditionalists doing it.
The kind of occultism mentioned in the link is the intellectual kind, not the folk kind. It is usually something for the more educated and intelligent. It seems to me to be something that the more intelligent and proud people will be interested in. People always want something new. The sacraments, the Mass and Holy Writ get old after a few years, unless, of course, you have a real and deep faith. Then you will always find old and news things, like Our Lord said.