Never heard of Ejaculoid (sounds like a horror movie monster). I believe Semenex (I might be spelling it wrong, don't feel like looking it up) is the most popular of these volumizers.
I don't personally believe in these chemichal semen boosters. The company I model for, did test comparisons with some of these and the guys a) didn't show real increases in volume with these semen boosters and b) some experienced weird and negative side effects. There's one booster in particular that was a major offender (not Ejaculoid or Semenex, but another one, I won't bother to name it because it just seems rude to bash a product when I rep a different product) but suffice to say I don't do chemical semen volumizers.
My findings are, if you drink a lot of water, take a male multi-vitamin, and learn to master your edges (I use a mechanical aid for this) you can ejacuate quite dramatically.
The only chemical sex enhancers that I believe work are those for erections, and are expressly (Viagra, Cialis and Levitra), I don't trust those GNC herbal erection enhancers either.