If a project is not active enough on their social media account like Twitter is this a red flag or a reason not to invest in the project.
For me personally, activity on social media is not really an indicator if a crypto project is legit and good or not. I mean just look at what is going on in the crypto space with airdrops and bounties and that stuff. Every shit meme-coin that is created by a single person can easily get 10.000 twitter followers withing a day if they announce an airdrop where you need to follow their twitter account.
So the number of twitter followers does not really mean anything, because we just can not know if a project got those followers because they were interested in the project or because of a stupid airdrop or another competition. You should check for other indicators to evaluate if a project is good or not.