It's mostly targeted against fake users trying to use the free trial. And although it could be hard to keep up, we also use several open source projects to keep

It's mostly targeted against fake users trying to use the free trial. And although it could be hard to keep up, we also use several open source projects to keep up with the demand. And very soon we are planning to add features like fingerprinting (no-cookies) that could already eliminate any normal/non-technical user!