GM's normally play serious matchs, or to win a price in a tournament when they play a tournament, not only for fun! If I and even you Lev, were GM, playing against other GM often, for a serious match, or to win the first place of a tournament, I am sure we would forgive the BDG for a standard opening, and only play the BDG on Blitz or CC play! Below the GM class, it's still "fully" playable, but we are not GM, and we generally don't play for money, but mostly for fun, so that's not a problem. When you play for money, you think twice before playing a gambit against a very strong opponent!
Quote:They are not afraid to play the King's Gambit; Latvian Gambit; Evans Gambit; Philidor Counter-Gambit; but do not want to give the BDG a fair chance? Sounds like a double standard to me.
I think that Evans Gambit it's a nice gambit even at GM level! About the Latvian Gambit, it have a bad reputation, mostly at GM level, but I know there are fan of the Latvian Gambit on CC games like Leisebein is with the BDG. King's Gambit is not that much played at high level, but it's still a playable gambit at GM level.
I would had somes good gambits: The Budapest Gambit (unrefuted and very playable I think, at GM level), the From Gambit after 1.f4 (but here White could play a gambit themselve with 2.e4 transposing into the King gambit

) But surely the most respected gambit at the best level is the Marshall gambit in the Ruy Lopez, also played at 2700+ and most of White chicken out with anti-marshall with a4 or h3 (I used your term

!!
You might say that if the BDG is playable in CC game, it does mean that it's not refuted yet and playable at GM level (I think that myself from a theorical point of view, but White have to play the best moves, often you can't find it over the board, making the BDG too hard to play on a normal time limit for a tournament or an important match)
And if you are an agressive player, a Gambit is not the only way to attack, the standard openings (for example 1.e4) can be very agressive without having to sacrifice a pawn. If I continue to play the BDG:
1. because it's still a surprise weapon
2. because I don't play against GM or to win the first price of a big tournament
3. because I am an agressive player, and compensation or not, it's still an agressive repertoire
4. because it's not considered as totally sound by most, so I like to be provocative and I like when my opponent want to show me his "refutation" but at the end, could't refute it.
5. because for the moment I only play it on Blitz and CC where it's a good choice (maybe I will try it on tournament play if I am well prepared; yes it does need a lot of preparation to know the BDG well against Black's different defenses!)
6. oh and the most important, because I have a lot of fun with it, and I have a nice score with it! (still on Blitz and CC, didn't try in tournament yet, but maybe I will do in the future..)