Content selected by a user of a web access television device is monitored via a profile controller associated with the web access TV device. The rotor and stator comprise a plurality of teeth having vanes, wells and generally slanted walls with a gap defined by the vanes and wells and generally slanted side walls. The platform may transmit the advertisement based on the second set and the communication based on the first set via one or more social media platforms. Another possible source of the data is a software application, running on a computer. In the event of a deviation from the desired conveyor belt overlap, the optoelectronic system initiates a correction of position by means of the guiding rollers. Outer supporting structure which, together with an outer chain supported by and movable along the same, defines an outer channel, in which one or more outer bearing elements are arranged.