There is spam daily and no controls in the contact form that are technically of any value. The simple "text to add into a box" preventative measure can easily be solved by an automated bot.
Most sites allow domains / users to add google recaptcha to contact forms, does Bookmark allow users to set up anti-spam measures in any way that are hard to bypass? Unless this is addressed, any business wanting to host on the Bookmark should think twice.
On this basis alone we opted not to use the lifetime account we own and moved to using other drag and drop site builders that take site security and form protection seriously.