Are People on OPT / F1 Visa Allowed to work online ?

I know this is not a legal sub, but anywhere here on OPT or F1 visa knows if apart from our regular job, can we work on say Prolific / User Testing Websites ?

I am talking about the US.

submitted by /u/alpha_beta_thetha
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source https://www.reddit.com/r/beermoney/comments/hm5nkg/are_people_on_opt_f1_visa_allowed_to_work_online/