From the linked page:

> The 9-Euro-Ticket is available in the period from 1 June 2022 to 31 August 2022.

> It is valid for one calendar month, from 00:00 on the 1st until 24:00 on the 30th/31st.

No, it's 1 month (in a 3 month period):

> For 9 euros, you can travel throughout Germany on local/regional trains for a whole month in June, July or August.

You can buy one each month, though. Even of you just use it for metropolitan transit, it's super cheap. My monthly pass (reduced because it only valid after 9 am so commuters have to pay more) costs 75 EUR. A single ticket ist 2.80. This is a good deal in almost any scenario where you take and applicable train.

> so commuters have to pay more

or start later...

Sure I can do that as a self employed Programmer, but typically employees don't get to pick their work hours. Most commuters have to be in the office by 9 a.m.

My point was only that the 75 EUR is already a price reduced monthly ticket.

Pro-tip: buy three tickets!