Sure, Amazon does it all the time to small startups. They fly you into Seattle, setup a fancy meeting with strategy teams and M&A, make you run through a pitch deck, explain every aspect of your business. They take diligent notes until they fully understand your inner workings, they tell you thanks, you'll hear from us soon.
And nothing happens, 6 months later AWS launches your exact product.
Founders need to be extremely careful when talking to potential acquirers. Dollar signs cloud your vision and you need to understand why they're talking to you. It may be genuine interest or it may be deceit in order to gain a competitive edge.