Ouf, how many events in a year in Japan? That's a loaded question

.
Just the main 3 (SEF, 9LoveJ, Star Fire) alone are monthly. Then you have lots of other events that are either monthly as well (Tsuchiura Gold, Super Euro Night, etc.), events that are once in a while (Club Bonkura, Kenya Matsuri, etc.), or one shot special events. Multiple of these events also do tours every now and then.
Long story short there are a ton of events but attendance is definitely declining overall. Events that used to be weekly (like B1-Dynamite) are lowering their frequency and some events are just outright stopping (did you all know that the legendary club King & Queen closed it's doors July? RIP Disco 90s and Magical Rave

).
Despite all of this, there seems to be some push to promote more aggressively and avex seems to be helping with that. For example the new Eurobeat Disney songs like Hawaiian Roller Coaster Ride and Namina Namina both have releases on SEB (as well as that avex Disney album) with clubs all over Japan promoting the shit out of the routines being choreographed for them. Plus these songs/routines are hugely popular.
Also Ryuichi, one of the main choreographers of TechPara in Japan, is joining forces again with avex which can only mean that avex is looking towards the para scene again to help promote their product.
It may still be a bit too early to speculate but despite the decline in interest lately, the scene isn't going down without a fight. If the support of avex does boost attendance in the clubs and also boost the sales of CDs then I guess the argument of whether Para Para helps or hurts Eurobeat will finally be put to rest.