What does "files limit" mean and how do it work?
The limit of number of monitoring files is a significant specification of your account. It is defined by the higher tariff plan of any of your websites.
For example, if your website example.com is in the Silver tariff plan and other websites are on the Free plan, then you have global files limit of 200,000 files, according to the Silver tariff plan.
It means that the total amount of all monitored files of all your sites cannot exceed this value.
Your account also has limit of domains which also is defined by the highest tariff plan. You can't add new domain into account if this limit is achieved.
Thus you can monitor the integrity of many websites having the only one of them paid.
You can find the values of both limits on your Profile page.