Just wondering on how the ssh provider earns if they are giving a month free ssh accounts?

Question

For ssh users, 

Some of the ssh providers have 5-7days only there is this one SSH provider who gives 30 days ssh account for free and its very easy to create an account. They have remote proxy as well all in one place. I wonder how would they earn from it?

Answer 1

^{Some of the providers might earn money through affiliate marketing or through charging for extra features, such as premium accounts with more storage or faster speeds.}

Answer 2

They may earn less, or maybe even higher pay by the hour. And if it is remote based they may use a different computer as they may have 2 computers, or have different servers.