Random, non-target-customer opinion: The slider is nice. However, it's not obvious how the venue size it selects (and the corresponding pricing tiers) affect the service offered. For example, what happens if I'm dishonest?
It seems like you're trying to tier the pricing based on a customer attribute (their venue size) rather than actual customer usage (ie their interest in value-added features, increased quota for certain features, etc). It seems hard to enforce, and also harder to upsell (ie if I'm a smaller fry, I'm never going to buy your premium plan). But I'm quite a bit out of my league here..
It seems like you're trying to tier the pricing based on a customer attribute (their venue size) rather than actual customer usage (ie their interest in value-added features, increased quota for certain features, etc). It seems hard to enforce, and also harder to upsell (ie if I'm a smaller fry, I'm never going to buy your premium plan). But I'm quite a bit out of my league here..