Mother’s Day founder Anna Jarvis quickly came to resent its commercialization.
By the early 1920s, Hallmark Cards and other companies had started selling Mother’s Day cards. Jarvis […] organized boycotts of Mother’s Day, and threatened to issue lawsuits against the companies involved. Jarvis argued that people should appreciate and honor their mothers through handwritten letters expressing their love and gratitude, instead of buying gifts and pre-made cards. Jarvis protested at a candy makers’ convention in Philadelphia in 1923, and at a meeting of American War Mothers in 1925. By this time, carnations had become associated with Mother’s Day, and the selling of carnations by the American War Mothers to raise money angered Jarvis, who was arrested for disturbing the peace.
— https://en.wikipedia.org/wiki/Mothers_day#Establishment_of_holiday