You can still sign up for free and monitor unlimited open source projects at GitHub/Bitbucket for free. The paid plans are required for private and closed source projects and for additional features like PDF/CSV export. Now the PDF and CSV export for the Bill of Materials in the license tab are only available in the higher paid plans.
The old plans are going to be continued. You don’t have to switch to a new plan if you don’t want. The old plans are available for booking until end of this month. You find the old plans in the settings area under “plans“.
The old plans can be booked until 1st of October. After that the old plans are closed for booking and only the new plans are available.