this is really bad bait my friend but I'll take it
Is NIP the male version of Team Secret? Both teams get invited time and time again to play in tournaments even though they always go out in groups
why do you talk about 2015 in this case? how is 2015 relevant? we know NiP had a bad year in 2015 but that was without pyth and without THREAT. now that NiP have pyth and THREAT in their CURRENT ROSTER and have had them since the beginning of 2016, their 2016 form is the only relevant thing atm although #23 makes a good point too.
so, in 2016 they've only been out in the groups of big LANs twice, at IEM Katowice and ESL One Cologne. so they don't 'always go out in groups' as you said. not sure I can explain it any more clearly unless you're that dense. although you probably are that dense and are either a baiter/mad NiP hater from what it seems.