Since you are paid in coins that do not yet exist, it does not seem to me that there is any cost.
It is a bet on the fact that what you receive.
My altcoins have disappeared, including scams and loss of value.
But in the meantime I managed to convert some into fiat, so I can't complain.
Theres still a cost if you are being managed by the good manager and of course a cost to create your product so many investors will come. The cost of making a new project is huge, and it requires a lot of works with the team and a lot of money to pay for your advertising program. The bounty might not pay you at first but you still need to spend some money on that to succeed.