Really? I'm on the verge of getting past 2,500 clients which will be a SLOW climb. Let's take a look at the actual cost-per-client:
2,499 clients: $0.624 cost-per-client, per year. -> with the Business 2,500 licence at $129.95 /mo
2,501 clients: $1.0793 cost-per-client, per year. -> with the Business 5,000 licence at $224.95 /mo
In case the math is not clear, that's more than twice the cost-per-client.
But wait, let's say we're on a roll of sustained growth and we get closer to the next tier:
4,000 clients: 0.6749 cost-per-client, per year. -> again with the Business 5,000 licence at $224.95 /mo
It's still MORE expensive than it was for 2,499 clients!
So no, those prices don't have the success of your clients in mind. Prove me wrong.