Why did Nike discontinue its FuelBand fitness tracker in 2014, despite being an early pioneer in the wearable fitness technology market?

The sports wearable technology market has transformed how athletes and fitness enthusiasts track performance. One product made a significant impact but mysteriously disappeared from the market despite initial success. Test your knowledge about this pivotal moment in sports retail history and the strategic decisions that shaped the current fitness wearable landscape.

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To focus on software development and partnerships with companies like Apple, rather than hardware manufacturing
Due to a major product recall after widespread battery failures caused skin irritation issues
Because its proprietary 'Fuel Points' metric was proven scientifically inaccurate by independent researchers
The FuelBand failed to meet Nike's sales projections, selling fewer than 100,000 units in its lifetime