The wave of invitational events in the end of July is caused by the proximity of the World Chess Cup 2013 that will dominate the month of August.
Multi-Master day at Chessdom Arena
Today is also Chessdom Arena 1+0 and 3+1 day where titled players (GMs, IMs, FMs) will play games at these controls all day long with everyone, independent on rating or experience levels. All you need is a free account, sign up here.
Later tonight a full schedule will be announced at the “Play with a Master” section, stay tuned for updates.