Nimiq seems to be too shady for me and I hope it won't cooparate with Lisk as I have significant amount of money invested (wasted :|) in LISK
There was too much doubt spread here in this topic about Nimq - and I can't find any reliable explanation unfortunatelly
The "doubt" you speak about is merely one or two bad actors using multiple accounts to astroturf the discussion and defame the developers.
If you want reliable explanations I invite you to come ask questions on Telegram or Discord, the community will be more than happy to provide answers.