I remember that in 2016-2017 it was possible to get a good profit on airdrop and subscription forum campaigns. Now it has become much worse.
In order to get the amount of money, you need to research a lot about the company and their innovative thoughts about their future goals which will help the coin to boost it's the price when they list in the market. Now, most of the campaign are scamming the investors and community after raising money so we need to very careful with those campaigns.