You see, in the past a scam would never be profitable as it would have never gain traction and support of the community.
times change. shitcoins are not on the 2nd rank of coinmarketcap.com 
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So, you think Litecoin is a scam? It is a clone of bitcoin, not even the first one.
no, i am just pointing out that coming up with guidelines like this is flawed. there are always exceptions to the rules. and in case of Litecoin, it is not scam, but at the same time it is not really doing anything special either. despite being profitable!Quote
Of course, everyone has their own guidelines, but a non-minable has nothing to give it value, with mining we have POW and this solo gives already value. What gives value to a non-minable shitcoin?
the value of a coin does not come from its mining. the value comes from its usage. if the coin has something to offer then it is valuable. of course it is debatable that what the coin offers is really useful or not, since none of the altcoins have yet gained any foothold in the real world!as an example of a non-minable coin i can name Byteball.
it is not at all a shitcoin, it can not be mined, and it has one of the highest values (price).