Fix: Hardcoded Buy Button Breaks Ad Inventory at 35K Visits

I'm stuck. I sold 13 ad spots, but TrustMRR displays 12. It's because the buy button is hardcoded. I manually push sponsors to prod for now. I didn't know the app would receive that many visitors in such a short time (35k visitors in 16 hours). How would you handle this? Possible solutions: 1. Add two ad spots. 2. Refund the last customer. 3. Rotate ads like Times Square (two ads per card, flip them). 4. ??? I would love to know what you think before making the next move. Please hit reply!