I'd be skeptical about that. A few years ago there was this craze about increasing working memory and thus IQ using the dual-n-back game (advertised as the only game that has transference to unrelated tasks). Turned out to be a placebo. People have been dreaming about increasing their IQs and from time to time fall to various fads. Until there is strong scientific evidence, these 'IQ boosters' should not be taken seriously.
I also wonder what the limits to learning are. At some point, if I learn something new, does pushing that knowledge into my long-term store replace or weaken an existing memory?
2) "Point of view is worth 80 IQ points" is actually one of Alan Kay's famous quips.
This statement as written is almost total nonsense. A cursory internet search yields abundant studies on adult neurogenesis. Even small amounts of cardiovascular exercise increase brain volume, stimulate neural growth, and create synaptic connections in adults well into old age.
At best, one could claim that neuron growth slows as we age, but it absolutely doesn't halt.
The studies which came before may be based on nonprimate animal models in which adult neurogenesis does occur. But the best evidence we have to date suggests that adult humans do not grow new neurons.