I know You don't want to hear such an answer @Segobebek but bounty manager has a full right to delete this stakes because of the bounty general or task rules.

I don't know for sure but assume that there is such a rule that if one gets banned or account suspended during the campaign all stakes will be deleted. Same rules I have seen many times not only for social media but for signature and all others campaigns. If one gets red trust all stakes are removed too if participants with red trust are not allowed.

Lately, the rules are a lot harder because bounty campaigns don't meet the expectations from ICO teams and don't work anymore as in 2017. There are no new investors despite thousands of people participating in the campaigns. In this bullish market, there are not many people willing to invest in ICO anymore.