After IDEA PINS were introduced by Pinterest none of the standard pins get any impressions or clicks. You can only find IDEA pins on the feed from random accounts you don't even follow. IDEA PINS do not have option to place a link in it which doesn't benefit the creators but if you pay for IDEA pins then you can add links to it which is called promoted IDEA PINS. Looks like Pinterest is now an ads platform if you want to get impressions or clicks on your pins then promote your pin by paying for it.
You actually cannot buy ads for IDEA PINS at this time. But to your point, Idea Pins will get the highest engagement verus your Standard Pins especially when you're using a video. Bottom line, you gotta pay to play on Pinterest. The good news is that it's still way cheaper than FB and IG.