I'd say this is an opportunity for #FOSS maintainers to collaborate taking advantage of. These companies that have been fortunate to earn tons of money by using open software without contributing back, can no longed do that if they want to keep doing business in the EU.
What could be a good EU based FOSS interest group to manage this smartly, collect _fees_ to distribute to maintainer of the used software.
Does @opencollective have an EU presence?