Jerome Gambit: BookMoves

I recently discovered the utterly fascinating BookMoves website,

What is the primary objective of BookMoves?

Opening theory represents one of the most instrumental aspects of chess. Familiarizing yourself with different situations can help you quickly develop your strategies and boost your confidence with respect to the game.

With the help of BookMoves, you can learn, study, and regularly practice the most popular openings and keep track of your progress along the way. Our system automatically suggests the most appropriate moves based on your experience and skill level. 

Looking in particular at "Italian Game: Jerome Gambit" I found the following information

The Jerome Gambit is a highly aggressive and somewhat controversial opening that involves an early sacrifice of the light-squared bishop for a quick attack on the opponent's king. This gambit is not commonly seen in high-level play, as it is considered unsound and easily refuted by accurate play from the opponent. However, it can be a fun and surprising weapon for club players and those looking to catch their opponents off guard.

Of particular interest is the honest assessment...

Frequency: 0.6 %

Stockfish score: -5.0, depth 44

Games Statistics:

White/Draws/Black

42%

3.5%

54.5%

Bookmoves score:

Rate	White	Black
0...1800	49.5	71.1
1800...2000	49.4	68.6
2000...2200	47.4	69.4
2200...2500	42.0	69.6
2500...	25.4	74.6

Well, that's one answer to the question "Why don't Grandmasters usually play the Jerome Gambit?"

I recommend that you visit the website, for education and entertainment - but, be careful, you will be drawn in, and time will fly by...