The company Facebook has updated the rules for placing materials, now it is forbidden to advertise crypto-currencies and ICO on the expanses of the service. This prohibition applies to Instagram as well.
I heard this news, but so far no problems have arisen. Maybe because my account is already 8 years old. Or maybe because I try not to do all the bounty at once.
On the other hand, and before this news I saw complaints, from members of the forum, on facebook.