Those are called faucets, and yes, there are still some faucets out there that you can use to collect a few satoshis every hour or so, but as you said, they are not investment options but they used to be a starting point for newbies in Bitcoin. When I first came to know about Bitcoin, I used to use faucets to claim free Bitcoins, and at that time, Bitcoin's value wasn't this high so faucets used to give away a lot of satoshis.

These days, you can hardly make $1 in several days using faucets because the reward rates have been reduced badly after the price of Bitcoin went too high, and people almost stopped using faucets so they don't really get enough ad revenue to give away a lot.