As the member of this forum and I do believe most of us are participating Airdrop coins and tokens and ICO Bounty campaigns and we're helping them achieve their goal especially on reaching their hard capital so we're being awarded with their coins at the end of their ICOs.
The coins and tokens that we receive it will circulate their coins on any Crypto Exchanges so we help them achieve their goals and we help them doing the trades.
That's one way of looking at it, another is that us small fish are building (eth) whales with a lot of small (ico) investments. We do not only build them, we do their marketing AND buy their coins.
An even more cynical view on the matter is that no one gives a damn about all these crypto experiments with tokens and just want ther 1 eth turn into 10eth after they sell them in max 1 year. But that's another story.
Let me explain with one simple example: 1 new coin, hardly any trades, lots of supply, 1 whale pushing the coin on 1 exchange with 100btc. Complete manipulation with all of a sudden a place on coinmarketcap of, let's say 89 and green numbers of +200%. What do you think will happen? The sheep on this forum start blabbering about what a great coin, such community, many innovations and wow devs. Action (100btc pump) --> REaction (talk on this forum). Not (always) the other way around.