Submit great vulnerability reports to participating Security@ programs and increase your Reputation. Invites to Private programs are generally only sent to hackers at the top by Reputation, Signal, and Impact on HackerOne. When your Reputation, Signal, and Impact are high enough, you will join the pool of researchers that receive access to those programs. Once you start receiving invitations to those programs, remember, the one universal rule is do not talk about Private programs you are a part of.
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