BeWelcome starts slowly to take off... at least that is what Alexa data can suggest [1]. CouchSurfing leaves HospitalityClub already since a year behind, but slowly, you can see the activity of BeWelcome. Not in terms of Reach or Rank, but in terms of Page Views (Modus: 3 months, Page Views). It seems as there is a strong core community that produces many many page views... One could imply that it becomes worth to visit the BW page more frequent. I guess that many people from HC emigrated first to CS, but now there is also a significant shift of active people (from HC and CS) to BeWelcome... HC reaches still a lot of people (stable Rank and Reach), but it has definitely lost huge parts of its community...

Source: [1] alexa.com/....