The A/B testing functionality would be much improved if you could specify what percent of traffic you'd like to devote to the LPs.
For instance, if you have an A/B test on something incredibly critical to your business, you probably don't want to do a straight 50/50 test, as this exposes you to far too much risk. You'd rather just test 10% of traffic on a new landing page, ensuring that you're not over-exposed, and that at least 90% of traffic will be driven to a reliable, proven landing page so your performance does not suffer too much in the case that you are testing an ultimately worse performing page.
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