Some of the events listed above are great for the premier player -- the kid going to a Power Five school and getting pro looks. But many are by invitation only, and so are not realistic for many players.
The point being, you can't really say what the top 10 recruiting events are. The question is, top 10 events for whom? If you are a guy who's on that fence between D3 and mid-major, the answer is going to be very different for you than it would be for the player who's going to PG National, Area Codes and such.
Oftentimes a player is best served by sticking to events that are closer to home, so that a coach at a school of interest is able to see him several times and, you can hope, come to appreciate him fully. Because baseball scholarships are almost never 100%, and often as low as 25% (or zero), looking at in-state public university programs is very important to many if not most players, so far-flung travels are not necessarily a good idea if they take you away from your target audience.
The summer WWBA events have for me lost a lot of their luster. 8-10 years ago, you would see coaches congregate at East Cobb and you'd play there or very nearby most of the time. Coaches from your state would come to your games, but others would just sort of cruise by to see what they could see. Because the event is so huge and spread out now, you just don't get that. Pretty much that event is for coaches who're following your team to see how you stack up against teams from other areas. If you draw a game 60-75 minutes away from LakePoint, often no scouts will be there unless you hold a top arm to pitch that game. The scouts aren't going to lose 4 hours out of their day going to see one game, not when they can just wait a couple days and see you at LakePoint later on.
Jupiter players are largely committed by late October of their senior years, so that is more and more a pro scouting event and less and less a college recruitment event. Underclass players fortunate enough to get on a roster there can benefit, though.
Of the PG events, I see the Junior National Showcase as one that can really ignite recruiting for the high-level player who may not yet have been "discovered," so to speak. The last several guys we've sent there from our program have done well there and as a result, seen an immediate spike in interest from numerous programs; most have ended up committing within a month.
The WWBA 17u at Ft. Myers is also still very good due to its being concentrated at a very few sites that aren't too far apart. But there are still a few venues there that may leave you playing for an audience of team parents. I hope that event doesn't grow so large that its value gets lost. For now, it's a great scouting venue open to pretty much anyone.
