5x during presale was already a red flag. If that was legitimate, that would be a really risky move for the project devs themselves from how invested they were in their project, it would gain a lot of investor but the cost and return of it are not going to be worth it in the end.
Discord itself is not a scam, but scammers used this channel to sell their masternode coins.
I recall mass closing of those Discord servers that I had joined back then when I was still looking for new coins to invest. The nightmare.