yes, it is possible. but now FB have updated the algoritma, so dont you dare to spam with bounty task because you have a big possibility to get banned from FB.
I don't think facebook will ban users who are sharing crypto related contents.
facebook, twitter, google are only banning crypto related ads on their platforms but still users could share any crypto related contents because facebook has no right to conduct strict instructions on what to be shared except child pornography, terrorism and other illegal contents that will have negative effect to the community.