This is a little late. It shows what board games acquired the most new players at BGG from Jul. 7 to Oct. 3. The number given is the number of new players (*minus 500 if I’ve never collected data on the game before, because no game shows up until it hits the 500 mark).

1258* Quarriors!
1082 7 Wonders
 588 Resistance
 573 Lord of the Rings: The Card Game
 573 Dominion
 519* 7 Wonders: Leaders
 506 Glory to Rome
 489* King of Tokyo
 456 Carcassonne
 442 Mansions of Madness
 441 Troyes
 437 Agricola
 417 Forbidden Island
 410 Merchants & Marauders
 408 Citadels
 400 Settlers of Catan
 385 Small World
 379 Puerto Rico
 378 Race for the Galaxy
 377 Innovation
 376 Pandemic
 373 Stone Age
 370 Dixit
 363 Dominant Species
 356 Ascension: Chronicle of the Godslayer
 344 Airlines Europe