Agree with the Marriott stuff being subpar. The Ren products are better. All things being equal, I'll stay in a Ren over a nearby Marriott in part because of the products.
I collect what I don't use, bring it home and put it in a giant glass vase. When the amount gets significant, I donate it to a charitable organization. In the past, I've given the stuff to a homeless shelter, the Ronald McDonald House, a battered women's shelter and a group that was making care packages for soldiers stationed overseas. The homeless shelter is only open from October through March. The last couple years, they've emailed me in September asking for the soaps, shampoos, etc. It's a family shelter that's located in a house of worship.
When I worked in an office, I had a box at my desk where coworkers would drop off their haul. The stuff would add up pretty quickly.