> When we started gmails were about $25 per 1000 so we were able to quadruple the price. Going higher than that is hard because all big websites use phone ver

> When we started gmails were about $25 per 1000 so we were able to quadruple the price. Going higher than that is hard because all big websites use phone verification to handle false positives and at these price levels it becomes profitable to just buy lots of SIM cards and burn phone numbers. How does that work? Don't SIM cards cost more than 10 cents?