It's all very vague to be honest. It's like I could have a UKARA membership that expires on 17th July. So that means I'm legit today and not tomorrow? What about if I start painting a gun this evening but it spills over into the early hours of tomorrow morning?
Unless I'm mistaken I have yet to see a clear definition of what does or doesn't constitute a defense in terms of being an airsofter other than most retailers basically treating a UKARA number as a license when it clearly is not, the 3 games thing is a UKARA guideline after all. As above I've had shops that know all my details including UKARA number but won't sell to me if it's expired despite selling to me in the past. I'd hazard a guess there's no UKARA enforcement team that says I'm now not a valid skirmisher. Not to mention most sites will then renew subsequent membership regardless of how many games you have played after initially qualifying.
I do understand what people are getting at though, even if the person they are referring to does have a sensible defense. I've witnessed quite a few "loopholes" over the years but don't talk about them publicly because it just encourages people to go about things the wrong way.