Re the Chilbolton circles, which show a face and a pattern akin to binary code or radio - there are several indications that these are man-made, not genuine.
So what was the point? Why were they done? The early debunkers claiming to have done the circles with boards, in England, got lots of media attention but were not, frankly, believed by the public. Those running the debunking program wished for a fresh start, and these circles are an attempt to get back into the media. After awhile, the plan was for them to come forward and present video of the making, and thus debunk afresh that crop circles are alien.