How do I know whether the giveaway actually grew the account or just the count?
Compare the engagement rate two weeks after the winner announcement against the two-week baseline from before the giveaway. If the rate held steady or climbed, the followers you gained are real. If it dropped, the giveaway diluted the account. The audit is the verdict, not the follower-count delta.
Is there a prize tier where filtering does not help?
No, but the marginal benefit shrinks at the top. A $5,000 sponsored giveaway with follow-plus-specific-reply entry already filters most of the noise through the entry gate, and the bot filter strips the last 5%. At the bottom end (retweet-only, $10 prize), the filter does 80% of the fairness work because the entry gate does almost none.
Can I run a giveaway without announcing a prize value publicly?
Yes, and some brands prefer this for legal reasons. The prize can be described qualitatively ("a digital gift card," "a branded merch bundle") without a dollar figure. The entry-gate-to-prize-value match still applies internally, because bot farms calibrate off perceived value, not disclosed value.
What about giveaway swap partnerships where two accounts pool audiences?
Swap partnerships amplify both the reach and the bot exposure. Run the filter pass on the combined entry pool, not the individual ones, because the bot accounts that follow multiple giveaway hosts show up in both lists. The result card should include both host handles so the fairness evidence is visible from either side.
Is there a point at which giveaways stop working for the account?
Yes. The rough line is three giveaways in a 90-day window. After that, the retained followers start overlapping (the same people entering every time), and the algorithm flags the cadence as promotion-heavy. Space campaigns further apart or escalate the prize structure so the audience has a reason to re-engage rather than reflexively retweet.