At most professional fixtures somebody sits in the stand recording every event into a handheld device. That person holds a credential, and the conditions attached to it are the point of the arrangement.
Physical presence buys the fastest data
Watching from inside the ground removes every delay a broadcast introduces, so a collector at the venue reports an event before any remote observer could.
Those fractions of a second matter to buyers pricing live markets, where being behind the market is directly costly.
Because presence is the source of the advantage, controlling presence is how a competition controls the market for its data.
Accreditation carries operational conditions
Credentials specify a seat or position, permitted devices, and often a prohibition on filming or on using the venue's public network for transmission.
Collectors are usually required to identify themselves and their employer, and to be distinguishable from ordinary spectators to stewards and security staff.
Breaching any condition results in withdrawal of the credential across the whole competition, which is a far more immediate sanction than a legal remedy.
Unaccredited collection is fought at the gate
People attempting to gather data without accreditation, sometimes called courtsiders, are refused entry or removed when identified, on the basis of ticket terms rather than data ownership.
Ticket conditions commonly prohibit transmitting information for commercial purposes from inside the venue, which gives the operator a contractual ground to act.
Enforcement relies on spotting behaviour rather than devices, since a phone is indistinguishable from any other and the activity looks like ordinary spectating.
Accuracy requires training and verification
Collectors work to a defined event taxonomy so that the same action is recorded identically at every venue, which is what makes aggregated data comparable.
Many operations run a second collector or an automated check watching a broadcast feed, comparing outputs and correcting discrepancies within seconds.
Corrections themselves are transmitted as messages, which is why a score or statistic occasionally changes shortly after appearing in an application.
Automation is displacing the human collector
Optical tracking and sensor systems installed in venues can generate much of the same data without a person, and they capture detail no observer could record.
Installation cost keeps that approach limited to major competitions, so accredited humans remain the backbone of coverage across lower divisions and minor sports.
Where both exist, the automated feed generally provides positional detail while a human confirms the discrete events, because judgement calls still resist automation.
