@Albert180
If I were you I would direct my energy and capital letters toward something that has some hope of success. Airbnb are refunding guests who cannot/should not be travelling with the guests money - not the hosts and not their own. They are also refunding their service fees to be fair.
At the end of the day there will be many losers (and very few winners) from Covid 19. The sooner people accept the reality and take sensible action the better.
By the way, lets say a class action lawsuit was started and was successful. Do you really think Airbnb would pay damages? No they would just go into Chapter 11 and then either Chapter 7 and reduce the competition in the market for STR platforms or start again post Chapter 11 with a clean sheet.
Lets just hope the virus dies down soon, guests travel again with Airbnb because they were looked after, and we all get back to making a living.