That is not necessarily true. Fr. Wickens often provided books free to the congregation. During Lent each year he would provide a book, usually by St. Alphonsus Ligouri, for Lenten reading. When I was instructed by Fr. Wickens upon returning to the Faith, he gave me a copy of An Introduction to the Devout Life by St. Francis de Sales. When it came to saving souls and defending the true Faith, Fr. Wickens was very generous.
My point as to the SSPX, was the lesson to be gathered from The Iliad: "Beware of Greeks Bearing Gifts".