It's not about exposure, is dying volume overall, far more competition and getting things even more complicated is the fact that they were dealing in BTC only, buttimes have changed and more users with a ton of coins want to swap in every kind of token, not something they built their business for.
Nevertheless, it is still a platform with good trading volumes, it provides flexible payment options in many countries that do not use well-known payment methods, or at least they cannot buy in traditional ways.
I do not have charts for trading volumes, but the platform seems profitable, perhaps their profits decreased and therefore they preferred to stop rather than the platform dying, but the advertisement is somewhat strange.