The GPL (and AGPL) are easy to comply with for a corporation, or anyone else really. Just redistribute your modifications under the same license, and ensure users can run modified versions on devices you distribute and you are done.
Were folks under the impression there were other options for license violations? Your comment implies that a lawsuit being the only recourse to enforce a license renders that license moot.
Some people just hoped that picking a corporate-unfriendly license would be enough of a deterrent by itself, because most folks can't actually afford to sue. But infringers, big and small, are increasingly realising that these licenses are toothless by themselves, they need to be backed by money.
