so "Try now" signs me up to your mailing list. Why doesn't it let me "try now"? Or at least let me look at a screenshot.

yodal_sl is half right, we've only just wrangled the product into a dog-foodable state, this HN submission didn't come from anyone in our team, I'm sorry you were disappointed in the wording on the landing page, I'll make sure somebody addresses that today. We're preparing a product demo video to send to a handful of people (for potential investors, more than something to drop on that site), but as I offered jjmanton above, find my email address in my HN profile, or tweet me @leehambley, and I'll be glad to talk with you off-list.

Smell a lot like an MVP collecting email address, before they really have a working product.

member345, the wording of the landing page is fixed, thanks for your patience. If you're on the mailing list, you'll receive something from us in the next few days.

The wording still implies that I'm "trying" and "joining". I'm still just signed up for a Mailchimp list.

Could someone explain what is happening on those photos with the blood bags?

some details here: https://mosaicscience.com/extra/inside-blood-factory

yes, on Chromium/Xubuntu