Because all coins were dealt for free, it is not a fraud.
However, it is regrettable that the developers disappeared...
My only regret is that I invested 0.018 BTC to create a wallet.

How is that possible? Why would creating a wallet cost you money?
The only cost is opportunity cost. Since you can only join one bounty campaign at any time.
Look at Op.
I invested in OSMIUMCOIN 's Wallet creation service.
I do not mean to blame Dev, but I regret it.
Windows wallet / wallet creation service by OSMIUMCOIN:
OSMIUMCOIN is assisting us on the creation of the windows wallet. After severalhours i gave up and OSMOIMCOIN assisted me. His bounty are a community based 0.1BTC + picoin signature campaign shares.
FINALlist of wallet creation service:
Chetlanin - 0.02 BTC
picoindev - 0.03 BTC
VizzerdrixUA - 0.002 BTC
Anon11073 - 0.018 BTC
lindin99 - 0.01 BTC
flaminius - 0.02
Dim89 - 0.002
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total: 0.102 BTC
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I'm sorry for your loss.
Are you sure guys that for this project there is no rescue? At the beginning looks very promising.. Why was abandoned?