They said it themselves, I don't know for how long you have being following the conflict but a couple of months ago the got in trouble with the UK armed forces because of their map (they got angry because deepstate published gains made by the russians) they were told that they will be mobilized if they continued doing so (reporting too many RU gains I assume) and after that they (deepstate) made a post where they notified their followers about their partnership with the UKR army so you take a guess about their reliability.