I can see the advantage for the user (25% of the BTC mined), and I can see the advantage for 21 (75% of the BTC mined) and Intel (sell some chips). But what's the incentive for the electronics manufacturer in embedding these BitSplit chips? If they're not getting a cut and they're not being paid, why would they integrate a chip even if it's free? The downside risk of embedding a chip that may become obsolete, break down, or negatively impact energy efficiency surely outweighs the marketing benefit of saying '21 inside'.