i think that maybe you should done your own research in order for you to avoid those scam by doing a simple research you can see that altcoin is profitable or not i already try these and doing this made my life easier especially when picking a new altcoin
Those guys are doing research for you.. Scams under "untrusted-airdrops" http://airdropaddict.com/untrusted-airdrops/ and "good" airdrops under "Daily Aidrops" http://airdropaddict.com/
These sites are really great. Another level compared to other sites who just throw everything into one basket. Thx for sharing!