You can start by allowing users to play and earn free without any form of investment or so. Just the way Sweatcoin did (although it is not a game project) but it has similar case with attracting new users to use the app and earn free coins.
The problem with many play to earn games is they are not user friendly, required lots of investment to earn a meaningful reward and so on. You can make the game fun and use friendly, easily to earn in at least in the first month(s).
It does really need an investment before you could start up and this is the normal scheme on which these play to earn games which isnt something that shocking or surprising.Its true that you could really have that
temporary earning opportunities without having those investment but its hard to believe on when it comes to sustaining because people or players would keep on cashing out as much as they could.
which does basically means that it would really collapse and ending up on being a scam project on the time that it couldnt really able to give something into its players
thats why everything cant just run for free.This isnt a charity on the first place.