Are crypto 'cloud mining' investment platforms scams?

4% daily is 4,000%+ annual. That math is mathematically impossible from mining. Real-world Bitcoin mining margins are 5–15% per year when electricity is cheap and ASIC pricing is favorable. Anything promising daily double-digit yields is a Ponzi structure — early users get paid from later users' deposits, until the operators close shop and disappear with the pool.

The 'platform' aesthetic doesn't matter. These apps are produced from white-label scam kits. The same UI, slightly re-skinned, appears under dozens of brand names every quarter.