A certain amount of people invested in the community will still be willing to host simply because they crave the social contact with other members. But besides that, a lot of passionate travelers are keen to host on CS because contributing in this way makes it more likely that they themselves will be able to save money on accommodation and meet interesting people when they travel. So, COVID won’t dissuade everyone from hosting.
Is this your own opinion or, other than meticulously picking through couchsurfer forum posts, how does one gather the sentiment of such a large community of hosts?