As someone who lived in Prague and has met about a dozen Bel Ami boys, I can safely say that, precisely because of the company’s zero-tolerance policy regarding escorting, they are difficult —but not impossible— to find. They are afraid to lose their job if they get caught, and Bel Ami is the best paying porn company in the region, by far.
Most of the ones I saw had already left Bel Ami (like the one you mention, Luke Volta), or else were not under an exclusive contract with the company. In any case, advertising is rare for them, especially in the Prague scene: it is easier to see their ads in Zurich (Steve Skarsgaard, Rocco Alfieri, Roald Ekberg or Danny Defoe come to mind), where there is more money to be made, and where they feel less exposed to their families, George Duroy, and their friends.