It's a beat-up of an earlier more scientific report.

The extent of hydrogen in the deep crust may well be as spectacular as the authors describe, but the concentrations are at the ppm level, and often require crushing of the whole rock to release tiny traces of gas. It probably costs more energy to do this than is released in the process, and leaves a big mess behind. - Note that the authors commented about how mining the hydrogen wouldn't be acceptable.

Although they refer to one hydrogen trap being found, this compares to about 100,000 to 1 million natural gas fields having been found in the same timeframe.

This gives an idea of relative availability of these two energy sources.