I've seen huge enterprise customers ask similar things in the past. Especially with startups, they know that if they decide to steal your algorithm and replica

I've seen huge enterprise customers ask similar things in the past. Especially with startups, they know that if they decide to steal your algorithm and replicate it, you will never be able to afford to sue them. I've seen a number of enterprises where they had a team large enough that they could throw whatever resources it took to build your solution and once they had some ideas how it worked, then they were off to the races. It could also be a bluff to see how far they can push you. Enterprises love to ask for ridiculous things to see if they can get it. I once worked for a fairly large retailer ($10b/yr) that wanted to put into a contract with Microsoft that they could have access to the Windows and SQL Server source code.