So, if I understand you correctly, the business strategy for an AI wrapper company would be that they acquire customers quickly from a specific niche, build a name, while having very little custom technology and then get acquired by some of the larger players who do have the actual AI tech in-house. And, for them, it would be worth it for the brand/market/existing client base.

Assuming that the advance made in the meanwhile in AI doesn't eradicate the whole thing. I mean say some company builds a personal assistant for managers to supplant secretaries, they become the go-to name and then Google buys them in 2-3-5 years. Unless Google's AI becomes so good in the meantime that you can just instruct it in 1-2 sentences to do this for you.