Not sure why, but they courted our company right from the beginning: got in touch with us within a month of us forming up, gave us a generous free startup credit, even invited us over to their Bangalore office and helped us with how we can optimize our infra.
Thankfully, the company reached profitability so we pay them rather hefty bills now. But I guess I agree with you in that that's not a typical startup's trajectory, and their ROI from the aforementioned outreach is likely relatively low on average so am wondering now why they went out of the way to help us.