I was about to post this exact thing when I clicked the link, but saw your post. Sorry. If they are not going to take their grammar seriously, than I am not going to take them seriously. Why no overnight holds? In stocks fer crying out loud?!?! WTF is wrong with everyone and the stigma of Eurasia blowing US stocks dafuq into oblivion? Guys, it doesn't just happen during ETH!
No, it is not a misspelling, it is a complete fumbling of the word grammatically. "Participent" is a misspelling of "participant". "Participate" instead of "participant" is inexcusable.