Talking about sharing experience, I would like to share my experience about stacking tron. when the price of each tron was around 0.02 dollars I bough some trons and started staking on my tron wallet it was the first experience and I would earn ~2-3 dollars per day, if you also count rising of the price my passive income gone insane.
I think a lot of people consider Tron a shitcoin, but as far as staking coins go I think it's one of the neatest out there, and it sort of reminds me of NEO in that you can stake without even having to keep a wallet running 24/7. Leviathan.007 was probably smart buying a bunch of Tron at $0.02--it's now worth $0.07 and was even higher than that a month or so ago. That's a decent way to earn passive income IMO.
i don't know any of the things OP is advertising but they do exist and you can also lose all your money in them as the shitcoin you are staking dumps or maybe is buggy and shuts down.
Yes, I get it that gambling on altcoins can produce profits well in excess of what OP was talking about, but again, we're talking about passive income here, not capital gains.
I cannot go through all the platforms listed by the OP but, yes, they're currently being offered.
I don't doubt that. I do question whether they're passive investment opportunities based in reality or are really Ponzi schemes.