Signal 6: Follow-to-Sub Conversion Rate. What percentage of new followers convert to paying subs within 30 days?

Why algorithms track this: sub conversion is a direct measure of audience commercial commitment. A streamer whose followers convert to subs at high rates produces real revenue, which platforms reward by amplifying.

Healthy thresholds:

• 5-10% follow-to-sub within 30 days = strong commercial conversion
• 2-5% = average
• Under 2% = audience is primarily passive viewers, not commercial supporters

What lifts conversion:

• Sub-only chat segments that demonstrate value of subbing
• Sub-emote design that fans want
• Sub announcement reactions that make subs feel rewarded
• Sub-only Discord channels with exclusive content
• Sub-trains and gift-sub culture during streams

What suppresses conversion: bait-and-switch follower acquisition (giveaway-driven follow spikes that don't translate to subs), follow-trains that produce ghost followers, audience demographics that aren't a fit for paying.

The 30-day window matters. The algorithm doesn't credit conversions past 30 days from follow date. Build sub-conversion mechanics into the first 30 days of every new follower's experience.