The only so-called “flags” (as you called it) came from low-posting accounts, including a mix of new users and aged, inactive ones. No known, trusted, or reputable members have said anything negative about them. It appears they were targeted by a sales-trashing campaign.
Two claims were made, but no proof was ever supplied:
1. Claim: They’re deleting ban reports
No proof was provided
2. Claim: They’re actively detected
No proof was provided
Both claims would have been extremely easy to prove if they were true but no one ever did.
I don’t actively use AimMaster because I have DMA, but during the sales-trashing period, I tested it myself and was not banned. Neither were any of the people I know who use it regularly.
It’s important to note that during this campaign, many providers were detected and some even shut down. AimMaster was likely gaining customers from those providers, many of whom had already been flagged. It’s common for someone to get banned with one provider, then switch to another without properly cleaning or reformatting their PC. When they get banned again, they wrongly blame the new provider instead of acknowledging the carryover risk.