> receivers as well prefer the simplicity of webhooks.

Do you see receive-side customers as prepared to outright reject paying for vendors that only offer non-webhook event streams if there's a webhook-ful competitor available? Or is that preference more of the "well, it's easier to add a webhook route to our existing webapp than it is to run a stream consumer/cron/whatever, but neither of those two is cost- or effort-preventative" situation, where customers don't consider event delivery systems to be the main differentiating factor?