Volume is the first thing to control because it is the easiest signal to get wrong. X does not publish exact reply limits, and the thresholds it does enforce vary by account age, history, and verification status, so treat any specific figure as guidance and confirm it against your own account behavior. {{TODO: verify}}
A practical daily budget for an established account is roughly 30 to 50 high-quality replies spread across the day. New or low-history accounts should start far lower, in the range of 10 to 20 replies per day, and ramp up slowly over several weeks. The precise count that triggers a temporary block is not documented publicly. {{TODO: verify}}
Per-session limits matter more than the daily total. Sending 50 replies in one hour looks nothing like 50 replies spread over a full day, even though the count is identical. Keep any single session under roughly 30 minutes and under 10 to 15 replies, then stop. The structured sprint in our fast reply challenge guide is built around exactly this idea: a fixed, short, capped block instead of an open-ended grind.
Watch the per-account ratio too. Replying three or more times to the same account in a short window, especially an account that has never interacted with you, reads as targeting. Keep it to one or two contextual replies per account per day unless a real conversation develops.
If you need more reach than a single safe budget allows, the answer is not to push the ceiling. It is to improve selection so each reply is worth more. A cleaner input feed, like the one in building a niche feed that removes noise , lets you hit your goals with fewer, better-targeted replies.