Adobe is pretty much banking on the "scrape everything" approach getting too bogged down in legal problems to be commercially viable in the long term. They're going out of their way to only train on licensed material so they (and Getty Images) will be the last ones standing if the worst case scenario happens for the companies who thought they could just take everything, and in the meantime they get the business of risk-adverse customers who don't want to chance it until it's settled one way or the other.
It's a decent lobbying tactic too - companies like OpenAI claim their technology can only exist with unrestricted scraping, and requiring them to license training data would kill the whole industry in the crib, but Adobe and Getty can point to their own products as existence proofs that it can be done but OpenAI just doesn't want to.