"thinking that this proposal to earn cryptos without investing is not real and that at some point they will ask you money for something."
Good insight, they suspect since you are making money blogging, might as well give them some instead of trying to earn some themselves.
For real, word of mouth is the way it seems as it will get the people who are really intersted to come and check it out and save us the headache of trying to market the gold still in the stone case.