There is a 99.9% chance that someone will be scammed in on the process and I will not rule out the possibility of both of them being scammers who are working together or working independently. There are different tactics scammers use these days, some pretend to be novice which some pose to be experts. We should always be smart to think both ways. Anyone who need information about staking knows that Google is there, even Youtube so I feel making the post here might appear innocent but can be suspicious. I will not also forget that it may be a genuine case too but we still need to be careful.
There is a high chance of what you said to happen because since is a public place nobody would suspect they no each other's and the number he pasted could be a tool to use and justify that some persons communicated with him through the number to have been able to share there experience to others on the thread, nobody is certain of what he might intend but based on how manipulative a scammer could be, reasoning his actions to be that of a scammer is good because if only unpredictable instances like this that was later resulted to a scam was thinking serious it wouldn't have had a victim, which is why I have a conviction that anybody whom I don't no ask for private discussion for investment I consider it as a scammer.