I feel like this needs some additional specification/limitation to make it a believable statement. The only good employer in the ads/data selling business?

Remember that the GAFA only have offices in a very few locations worldwide. Can't work for them if they are not here.

I left Criteo a handful of years ago and I can easily admit the work conditions were really nice, and the skill level among the team quite high.

I can also say there are other companies with comparable perks and technology level (or maybe the code level of Criteo has very considerably increased, but looking at what's open sourced, like cuttle, it doesn't seem like it), like some founded by former criteo employees (or c level dudes, since JB Rudelle is creating a new tech company with Romain Niccoli)

Your answer sounds to me like a false dichotomy argument.