mobile apps, whre they tell you, that you can mine bitocin through mobile are basically full of shit...

Only viable apps for crypto are from the hosting centers, where you can manage your miners etc.
The only way to make money in mining is to have a location with cheap electricity and mine the coins yourself.
In other cases, either the data center will cheat or the application will pay you very little.
Not true at all, if you manage to get a contract signed by a reliable hosting provider, which for example I have, you can even check that your miner is physically there and other stuff, with nice electricity prices that can get as low as USD 0.05/kWh
Mate, in my country honest hosting starts from 5 cents, but this price is not for one or more asics. In my country hosting charges for maintenance and charges for hardware installation, because the hosting company has to recoup its investment.
If you believe that oneminers company will make you a millionaire, then invest more money there. I have already seen 2 cycles where such companies went bankrupt.
Listen, there are other hosting locations for example in Nigeria etc. where you can get a really cheap electricity with hosting
Oneminers is actually making me some good profits every month... Iam not saying i will make me a millionaire, but it is a nice way to diversify your portfolio and to crypto mine with nice electricity prices