Pinterest Crawlers - Redirect URLs to one Post

[Ergoprime]

I don't want to spam Pinterest with one URL, so I thought: Why not upload many Pins with different URLs and different images which redirect to my Post. I could promote the same Post as much as I want, because as far as I know Pinterest doesn't use any crawlers to see whats behind the link.

Or am I wrong? What's your experience with redirecting URLs in Pinterest and Pinterest Crawl Bots?