No way.
As with anything involving money, you can only really earn as much as you invest into buying or mining. Airdops are free and so their price reflect that. Nobody is giving away fortunes for free.
And tokens are crap though; the 'devs' create them for absolutely free and they're just giving it to people (and themselves) without transparency or fairness and just trying to convince other people that it's actually worth something. Might as well just give people handfuls of dirt. That's not going to make anyone rich but themselves.
Airdrops maybe not, but bounty campaigns are very generous and some campaigns are really giving away little fortune.
I am always surprised to see bounty giving away more than a million dollars to their participants.
Something what is created for free doesn't mean that it won't reach high value. After all, it is crowdfunding and whole idea of smart contracts is that they can be created for free.
But what's the point of going backwards in crypto and trusting 'devs' to spash around their explicitly worthless coins? I say 'devs' because anyone with basic knowledge can create their own, plug and play tokens and many people did just to scam others. Those coins and tokens are are not trustless because you have to trust the devs that they don't take all their coins and dump on the market, essentially ripping "investors" off, AND they'll live up to their promises. And these coins are also not transparent because they can give as much of the airdrops/bounties/etc. rewards to themselves as they want and no amount of white papers and excel spreadsheets will prove otherwise. Meanwhile, with trustless coins the blockchain is all that's needed.
The oldest coin - Bitcoin - doesn't suffer from any of these issues because it's a simple yet trustless and beautiful system and all the ICOs and tokens are downgrades from that. So why waste time and money with them? The only reason to do so is to try and get rich quick - aka. gambling - which also shows if either someone is just utterly stupid to understand why cryptos are great or they doesn't care.
If Bitcoin's price wouldn't skyrocketed as it did, and let's say it would be still around $1k, this whole greedy ICO nonsense would not be a thing.
The whole kickstarter/startup scheme is not just a cancer to legit cryptos, they are incompatible with crypto fundamentals but the massive influx of newbies who came here because they saw how much Bitcoin was worth and want to chase the goldrush that isn't there couldn't care less are actively giivng a bad name to cryptos.
The fact that so many companies and countries are more and more concerned about ICOs should give you an idea.
I might be too much of a purist, but I think no coin that had any premine, or it has a company or even public figures behind them should be taken seriously.
Bitcoin didn't have a premine, there's no company promising the stars behind it (that could be taken down anytime by the country they're registered in btw) and it only has Satoshi behind it, whom we still don't know much, if anything about. There's no public figure(s) with social and political views behind it and I strongly believe that's partly the reason why Bitcoin is where it's at.
All that money that got poured into ICOs are just dumb people gambling with them mostly getting ripped of. But it's not building anything, especially nothing that's better than Bitcoin.