I would assume they benefit from Perl code (not sure how much at this point in time), and want Perl to continue to be maintained, therefore, they benefit from this donation.
OBS is a service that SUSE provides to the greater open source community free of charge for everyone’s benefit. It’s not a great example of greedy corporations taking more than they give back.
Package hosting, security updates, gradual improvements after perl 7 didn't pan out (?), Raku is an ongoing language in continuing development, grants, events, etc
perl 5 specifically has had ~15 releases so far this year. (not counting release candidates)
