Same problem for me.. I have a balance of 0.09 so there should be no captcha but since yesterday the captcha appeared. I heavily use automated claims, never play multiply btc.. Probably they are taking measures for people like us
EDIT : Problem solved! now I'm back to no capcha, was probably a temporary error
In other post theres an answer of freebico.in admin:
That was an accidental side effect of another change we made. We rolled the change back so it should be back to normal now.