I don't know how profitable this mining can be but for those that are making small small profits from mining crypto apps should continue trying their best to make money and while investing their realized funds on other cryptocurrency projects like Bitcoin which should be the number one for anybody. I think due to scam and so many fake promises that have been given to miners and not fulfilled, several fans and participants have left mining alone for those who can be patient to take their precious time to mining what they don't know if its going to be profitable.
This is not about cryptocurrency mining apps but about cloud mining as a project and wave that make mining achievable with mobile phones, but from what we have experience alot of them are just scam since they are like investments, and many Ponzi schemes have sprung up from them in recent times.
Even the crypto mining app we talked about are not perfectly functional 100% majority of them just end at testnet stage or after the bounty.
Although we can not deny the fact that we have some of them that may be development-oriented and with a long-term operations blueprint to run with, those are the relatively successful and known among them.
Most of those could mining platform promise passive and easy income by just mining on their platform using their phones. Which usually ends as scam and this is common type of frauds we have seen for many years in this industry.
Many of those project didn't past on bounty stage or on testnet and we could see that they are not created to last for long term.
Although we can't also deny that there are legitimate cloudmining platform, but I really think its not worth it to invest since profitability is declining. So its better for us to be vigilant and cautious on the risk brought up by cloud mining scams and better threat it as high risk investment which better to avoid.