No, hospitality on Couchsurfing should free. A Host should never ask a guest to pay for their lodging, and a guest should not offer. We do recommend that a guest show their appreciation by cooking a meal, taking the Host out, bringing a small gift or some other gesture.
Hosts should only offer what they are able to offer freely and clearly say what those things are in the Couch Information in their profile. If there are some things, such as food for the Surfer or shared utility costs, that can't be offered unless the Couchsurfers agree to share the cost, this should be discussed between the Host and Surfer (but should never be a requirement for surfing with that Host).
Couchsurfers may use the website to look for flatmates as it is a great way to find others who are willing to join a home that hosts, and many Local Discussions have associated threads for apartment hunters. Postings from brokers or real estate agents are not allowed.
If you have found someone that is charging for accommodation, please report them to our safety team.