Remember Shockwave, the local scene that the decided to try banning a bunch of characters in order to increase attendance? It's been two months now and we have a decent amount of data, so let's look at it.
Let's start by looking at some tournaments before the bans: Shockwave 129 had 50 entrants, Shockwave 130 had 55 entrants, Shockwave 131 had 67 entrants. Okay, that's a pretty decent baseline for what we could expect from a Shockwave. The first week (Shockwave 132) was the most hyped up, the FP2 week, and it had... 91 entrants. This was a notable increase in entrants, but many believe it was largely because of it being the first tournament of the banned series. The second week, with only Steve banned (Shockwave 133), had 67 entrants. Shockwave 134, with only Kazuya banned, had 60 entrants. Then both Steve and Kazuya were banned for 135 and 100 entrants, with people traveling out of region to attend. 136, with all DLC banned, had 51 entrants.
Moving on to "Happy Have Fundies Holidays", 137, with Steve and Kazuya banned, had 32 entrants. 138, with Steve, Kazuya, and ROB banned, had 46 entrants. 139, with no bans at all, had 51 entrants. 140, with Steve, Kazuya, and ROB banned, had 61 entrants.
It seems pretty obvious to me that 132 (FP2 banned and first week of the experiment) and 135 (first time both Kazuya and Steve were banned) were outliers. Compare 135 with 137 and 138 and 140.
It is hard to know about every circumstance. It seems fairly likely that many people would be unable to attend for the 21st, and more would be home for the 28th, so that could affect the numbers. Still though, it seems that bans didn't greatly affect numbers one way or the other, aside from certain outliers. A ban in order to increase attendance seems unlikely to work long term, even after one month people seemed to stop caring too much about Steve/Kazuya being banned or not (at least when it comes to attendance).
Those who were hoping that banning characters would inject new life into local scenes will likely end up being disappointed by this experiment. Those that are against a ban will likely be pleased, since it shows that one of the pro-ban arguments ("If we ban X character more people will attend our tournaments") is likely to be a very weak argument long-term.