Adopting new SaaS through AB-test-driven pricing

The target audience of this idea is small businesses that already generate some revenue, but are very limited in resources. (Hello bootstrappers ;) )

Situation

• You discovered that incredible SaaS that claims it will drive sales / reduce churn / improve adoption / { INSERT_YOUR_PROBLEM_HERE }
• You are interested and would like to try it out
• With your traffic volume you DO NOT FIT within their free tier
• The time you need to actually learn whether it will pay off is longer than their trial period

Complexity

• You need to make a decision about how much you are willing to lose if it doesn't work
• You might spend time on integration and creating content that's gonna be wasted

Proposed solution

• You get a free tier with ALL the features you want to try out, but the software is enabled only for the portion of your traffic
• It tracks and presents you with the metrics that you need to calculate your finances. It also automatically shows you the comparison with the 'base variant' where users didn't interact with the tool
• You can run in it such mode as long as you want
• The moment you are convinced it's worth it - you can switch to a paid plan
• And if it hurts your metrics there is a kill-switch

Your Input

• Did you ever face the problem I describe?
• Would you be interested in such a solution if it was offered as one of the pricing tiers for the product you are doubting about?

Thanks for your input!