A cheap TV streaming stick that promises unlimited content for a single payment can carry a hidden cost: your home Internet bandwidth. According to a new report, such generic devices may secretly rent the user's connection to third parties, turning a bargain box into a quiet revenue stream for someone else.

Security experts have raised this concern for years, warning that these products—often sold under unfamiliar brands—monetise the buyer's broadband without consent. The report references a groundbreaking new analysis of the problem, but the source material does not spell out that analysis's specific conclusions.

For consumers, the practical lesson is to treat too-good-to-be-true streaming deals with suspicion. Reading reviews, checking the vendor's reputation, and avoiding unbranded or unknown devices are reasonable first steps before plugging one into your home network.