Unfortunately i need to disagree with you.
I can show you how easily it will be to solve any type of visual captcha. Image, video , encoded data , name it all.
All data's shared between your browser and server can be decrypted , manipulated.
Stake's cloudfire anti bots implementation is far from perfect.
I've created one in one day of fun playing.
There are 2 options, stake needs to change the methods, or we can create a free service for all users to have a chance (this isn't reliable since some1 needs to cover some server costs )