thats because general size swapping are for sizes with larger differences. Some people will probably just make the .5 difference work for themselves rather than go through the trouble of finding a half size swap. Those who have a size 10 and need a size 8 will have better chances at finding a swap than a 10 looking for a 10.5.
This is true. Half size swaps usually happen the first week of releases and only become more scarce. The longer you wait the harder it'll be. I was able to trade my sz 10 pb's for 10.5 the next day easily via CL's.
Trade: DS Sz 2016 10.5 PB 350's for your DS Sz 11 OT 350's or DS Sz 11 TB 750's
Trade: DS Sz 10.5/11 350 V2 +$ for your DS Sz 11 CG 750's
Trade: DS Sz 10.5 Scarlett HR NMD for your DS Sz 11...