I tried this and it didn't seem to work. I'm mining scrypt with the original gridseeds (5 chip gc3355) and they need a difficulty around 256. I set the password as 'd=256', but nothing changed.
Does this pool merge mine scrypt?
It 'just gives us hint'; the pool will adjust accordingly anyway.
Why do they need the difficulty at 'around 256'? Does it crash?
No, the difficulty only adjusts down to around 2k. I'm using the cpuminer-gc3355 that auto-tunes each chip and it throws that off. The software tries to fix them by restarting:
[2017-09-13 17:29:12] 18: Restarting GC3355
[2017-09-13 17:29:13] 18@0: Lowered GC3355 core frequency down to 875Mhz
[2017-09-13 17:29:13] 18@1: Lowered GC3355 core frequency down to 900Mhz
[2017-09-13 17:29:13] 18@2: Lowered GC3355 core frequency down to 900Mhz
[2017-09-13 17:29:13] 18@3: Lowered GC3355 core frequency down to 975Mhz
[2017-09-13 17:29:13] 18@4: Lowered GC3355 core frequency down to 925Mhz