Abstract: Systems and methods comprising determining a first user in proximity to a point of sale (POS) device of a second user, the POS device having detected an identity of the first user and a number of devices associated with the POS device. The number of devices is compared to a baseline number of devices in proximity to the POS device, which is based on a time of day and calculated from a time period prior to the time of day. Based on a determination that the number differs from the baseline number by more than a threshold amount, data is generated that includes an indication configured to be displayed utilizing a client application executing on a device of the first user, wherein user interaction with the indication enables the user to at least one of initiate or modify a transaction with the second user.

Abstract: A subsurface drainage pipe includes a tubular main pipe body having inner and outer surfaces and a longitudinal central axis. Walls defining a plurality of slot-shaped apertures through the inner and outer surfaces along the length of the main pipe body are provided. The slot shaped apertures are angled with respect to the central axis.