The number of leads is impossible to predict. The volume of leads is based on how many consumers register and opt-in. The good news is you only pay when a lead is purchased. It is pay-as-you-go. Due to the unknown amount of volume, we always suggest a minimum of $100 (which at $10 a lead, for example, would be 10 leads). Of course, you may consider putting more in your DOOR Wallet and locking in your lead price early for the year. In that case, you may consider $500 or more in your account if you're a small business. For larger (regional/national) businesses, the amount should be much larger.