Ok ive had some odd captchas in the past (word wise) but ive never had one that says "type anything" (i typed a swear word it worked!) and one that did nothing! Well part from open tell me to enter a contest!
I have seen a few capcha where you are required to watch a video and type in what they said as well as a few that have required you to do a survay and enter the last question. usually those are capcha that pay the website
No question i just feel that these are bad captchas, as for the ones you mentioned i would refuse to use a site if they wanted to waste my time with a survey, video or something else. A captcha imo is there to stop spam, not waste my time with adverts or surveys.