That's nonsense. First off, ARM is able to "keep up" with only tens of millions in profit a year. Second, Qualcomm is one of the richest chip makers. Third, Samsung hasn't been using custom CPUs and GPUS - at all.
Samsung has not yet used their own core, but their custom 64-bit ARM core is at an advanced stage of development: http://www.kitguru.net/components/cpu/anton-shilov/samsungs-...
Qualcomm is big, but Intel, Apple, and Samsung are all targeting custom cores in this space, and they may reasonably feel like doubling-down on their LTE technology and not trying to compete in that space.