Is it the additional data you give them to enter the giveaway?
Basically. You’re telling TP-Link that you’re a business that’s interested in selling their products. In return, their Sales team now has your information and can pester you tell you all about the latest TP-Link products.
Additionally, they’re putting their products directly in the hands of customers who could become even bigger customers. If you, as a company, decide you like the product, then you’re probably going to buy more of said product.
Finally, TP-Link is being selective about who gets the freebie—they’re not just handing them out willy-nilly. From the fine print:
Offer valid only for SolutionX partners. One Insight S445 (2.8mm) camera per qualified SolutionX partner. Approval is required, and TP-Link reserves the right to verify applications
So there’s probably some sort of “legitimacy threshold” you have to clear in order to get the goodies.
It’s not that bad. A traditional yogurt-making practice is to put a couple ants into some milk. The microorganisms and enzymes that the ants introduce helps kick off the fermentation of the milk, turning it into yogurt.