How much does this really matter anyway? If your app is devoid of content or users won't it be obvious even without seeing a "low" auto-incrementing ID?
It certainly doesn't matter to your customers, of whom 99.999999999999% will never notice an id in a url.
And if you're about to IPO, just multiply all ids by 5 where customers might see them. You're not lying about how many customers you are getting if some analyst sees that, but you might get a few extra bucks per share.
