These are fine for sharing, but you have no ability to organize the stuff you're curating into a website-like presentation. You also can't control how its arranged (default chronological). I think there's a big opening for something like this, that lets people curate stuff they find and arrange the presentation.
Also, if you're using a platform like FB or Twitter or Pinterest, you can't monetize, so basically you'll never invest too much into it, plus it can all be deleted at any time if its on their platforms.
Also, if you're using a platform like FB or Twitter or Pinterest, you can't monetize, so basically you'll never invest too much into it, plus it can all be deleted at any time if its on their platforms.