What does a 3,000-episode back catalog really cost?

The first 800 items across all your channels are covered by the $29.00/month base plan. The other 2,200 are $1.50 per 100, about $33.00: charged when you add that channel, then about $33.00 every month after that to keep them indexed.

So the recurring bill is the $29.00 base plus that catalog overage, plus any websites or API keys you turn on.