this web is still paying? is recommended to invest here?
I have invested almost 1 btc at start, just trying to reach my roi on that investment

and all the withdraw have been instant so far

How it works? after purchase just forget it to withdraw your interest earned or you need to regularly login to collect your coins?
You need to log in on a daily basis to collect the ore's that is generated from the mine.
It will take you less than 5 minutes to complete that.
Regarding your deposits, I don't think there's a rule that you need to check in regularly for your coins to increase.
Interest from deposits is not that big, but it's better than using faucets.
Thanks for your time to explain in details. Since they also have signature campaign thinking to invest some to earn some profits.