It might be construed as unethical, but it's also a case of adverse selection, which for what it's worth is instrumental to a large class of business models, an

It might be construed as unethical, but it's also a case of adverse selection, which for what it's worth is instrumental to a large class of business models, and especially in the digital age. Much of it is software's intrinsic ability at providing external uniformity even in the case of internally unsound design, coupled with withholding of source (primary auditable information) as essential to business. It's not just Snapchat. Lots of software targeted towards programmers, sysadmins and power users relies on similar smoke-and-mirrors branding that tries to hide as much technical details as possible in favor of presenting grand high-level summaries that present it as a solution to an imminent problem. Either way, the assumption is you won't screen them.