Didn't know that some airdrops requiring their participants to install an application or extension to mine cryptocurrency, thanks for the heads up but It is fishy to tell that they want to install some random applications that may contain some viruses and backdoors to steal the user's data and wallets, It should not be required in the first place and risky at the same time if the tokens are based on an ERC20 wallets why the hell they want to install something? 90% it is a virus or a hidden miner.
Some projects actually provide an application or a web platform. So to use services you need to use them. Some of this android/IOS can have hidden miners. Sometimes sites of scammy projects can have miners as well. You open the site and can here your PC became oo noisy or see CPU usage increased. In this case airdrop is used to attract future victims. You should never underestimate the creativity of scammers nowadays.