I agree and read what Alleyo read in the newspaper. I had read that too. I think that Rick Steves is going to cancel all the tours for the rest of the year. I believe he is doing it in piecemeal. First he cancelled up to August and now September 6. He does not want to overwhelm his staff with the paper work and refunds they have to provide once they cancel the tours. People expect the refunds fairly quickly. If all the tours were to be cancelled all at once, for the rest of the year, then his staff would be working non stop to provide the refunds quickly. It cannont be done, this way, they can do their job and return the funds in a reasonable amount of time without the stress of getting everyone's refund in the mail.
Once they finish up providing all the refunds up to Sept 6, you will see he will cancel tours for September and October. Until he is able to provide all the refunds up to December.
Also has others have pointed out on this forum, if you look at the our tours section, for all the tours, they are all filled. They were not all filled in March and April. I think they said all the tours were all filled, so that no one can sign up for the tours as they are not going to accept deposits on tours for Oct, Nov and Dec and any other tours in all the months for this year. Then they would not have to return the deposits knowing full well they will be cancelling all the tours.