I've used No-ip for non-mission-critical dynamic IP services and for domain registration for over 10 years. There's nothing "shady" about them.
They offer a free service that is sometimes exploited by criminals and are very responsive to reports of abuse.
Microsoft not only didn't report these criminals to no-ip- they actually sealed the court order so they could seize the domains before no-ip found out about it.
It boggles my mind that a vigilante corporation can get a court order to simply seize another companies assets.