i can use standard Joomla "reCaptcha" plugin for CB 2.0.8?

i'm not understand, why CB no use standart Joomla reCaptcha plugin? where settings in CB for use Joomla reCatpcha plugin?



Joomla team already developed this plugin. i can use this plugin for CB?

================
p.s. this is so strange... i can install Kunena or another components on site and i can use "reCaptcha".