99% is exagerated but let's Say 70% of Air drop are SCAM but There are Also à lot which require You to do some other actions for claiming the tokens and that of You Don't follow their Telegram anymore You Wil Miss those Steps. There are also Projects which fail their funding  and Don't distributeur their tokens. And so in the other 30 There are 29% that are Worth Nothing. The 1% Left are the Good surprise this Year like Hydro privcy or nobs crypto.