Adding the Google reCaptcha on forms limits the amount of spam you may be getting, but not all spam can be filtered for several reasons:
Although there is nothing you can do about the spam you receive, you can still check your Google reCaptcha settings and ensure that they are optimized for your situation.
It's been reported a few times that suddenly, after an update, fatal errors or Class not found errors can occur when accessing an extension or a page hosting a Simplify Your Web extension.
Although a major issue (since it may crash the site on some pages), it is easily fixable.
This set of articles have been created in order to increase people's awareness about the Simplify Your Web products.
It is aiming to show how those products can be used and point out not-so-well-known functionality.