Okay, there are a LOT of scammers in the cryptomarket.

Therefore I thought it wise, before I start writing blogs on specific games/mining apps, to give some basic advice to follow.

1. Earning free crypto takes a lot of time and effort.
Not only does the organisation that is handing out crypto for whichever type of exchange (more on that later) need to be making a profit for themselves (otherwise they can't keep up with the increasing demand for free money and cannot expand or invest in improvements or do anything), but also consider development costs and also consider that they do not want the crypto they are handing out to devalue because that could seriously harm their business model.
So in effect any organisation offering you large amounts of crypto without expecting you to invest your own money can't afford to be giving big payouts, so any organisation offering you large amounts of cash/crypto/giftcards is likely to be lying about the height of the payouts or to be an actual scammer.

2. With everything that's for free the product the company is selling (which is what every company anywhere is doing) is actually the data of the person "benefitting from whatever free service/crypto/cash the company is offering".
So if the product is free the product is actually you. Not that bad, it can still mean you get decent payouts, but it definitely means they are somehow making money off of you. Something to be aware of, there are also (for the moment still under development) cryptocurrencies that are centered around actually giving people control back over their data and giving people the option to benefit themselves from which ads they watch instead of having a middle-man take off with the larger part of the profits.

3. It cannot be re-iterated enough, spelling errors and other inconsistencies tell you you're dealing with a scammer.
The real deal will care enough about their product to use proper translators and/or copywriters.

4. Pop-up loginscreens:
This is a surefire way to recognise scammers, they are merely trying to phish your login details.
Any organisation actually paying out anything at all will only ask for data that doesn't give away your login details, most often they don't even ask for an e-mail address (coinbase based payouts being the exception as coinbase accounts are tied to your e-mail address), but a wallet address instead.