WAPStart appears to be a website providing access to Facebook services and related features such as Messenger, Marketplace, and various other Meta products.  It's unclear from the provided data if it is an official Facebook partner or a third-party platform.

WAPStart

WapStart | 448 followers on LinkedIn. Self Service or Managed DSP with quality Tier1 World Wide Traffic. | WapStart is the largest mobile advertising network and the owner of the most popular and complete mobile sites catalogue Top.WapStart in Russia. WapStart services thousands of mobile publishers with over 40 million unique visitors and over 5 bln impressions monthly. Plus1.WapStart unique technology allows for detailed targeting and analysis of the visiting audience, resulting in the most relevant ads placement for increased ROI and monetization.

WAPS

RU:WAPSTART

WAPStart