I see them now and then at various places. Not always where you might expect them to be though.
I have tried the trick of covering the individual matches in wax and was not real impressed with the end result, although it did work. It seemed like the wax penetrated the match heads and when I went to strike them sometimes the wax would come off and take much of the match head with it. I would say about 1 in 3 of the matches I coated in wax did this. In fairness to this technique I only tried it once and with no more than a few dozen matches.
I can't say that I ever tried soaking them in water after coating them to see if I could dry them out they would still strike. I do know that a friend of mine coated just the match heads and some of those got dunked and would not light. I am guessing water got to the match head through the stick somehow.
I pretty much went to a butane lighter in lieu of matches. Seems simpler to me.
The wax idea seems messy too. I think I might be inclined to use my vacuum sealer in lieu of coating a box of matches with wax, if I wanted to try and store some longer term. But, my inclination is to buy a handful of butane lighters instead.
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Warning - I am not an expert on anything having to do with this forum, but that won't stop me from saying what I think.
Bob