What is the ruling on earning profit from the "protypers" website, which relies on typing CAPTCHA codes in exchange for financial payment, knowing that registration is free and payment is based on the number of completed images (for example: $1.30 per 1000 images)?

There is no harm in converting codes into texts and being paid for it, because it is of the same nature as being paid for writing, transcribing, and translating, which are originally permissible activities, provided that the purpose of converting those codes is permissible, and that the wage is known.