Presently i detect that few bounties still allow red trust accounts to wear their signatures, i think this means the bounty project is been managed by bad bounty manager or what do you think?
They literally don't care about their participants, they just want to get more members for more exposure.
Most of the signature campaign does not accept accounts with red tag but there are still some who are accepting and I think its up to the investors now on how to decide as for sure if the company allows these members to be in the campaign, they have already evaluated that and might see some possible good result for allowing.
for example E3T bounty allows red trust account, is this normal ?
It's not unusual as well, some campaigns accepts red trust participants, some does not and that's normal.