The fact all three members have not been online the past few days speaks volumes as it could be related to more (as of yet undiscovered) accounts but that is a different matter altogether.
The last time all three accounts were online was on April 28. But it is noteworthy that on the neighboring forum, they also participated in signature companies; two participated in one (I don't know if they violated the rules on that forum), but their visits were at different times.
But still, if there are no explanations and justifications, then we can guess that these three accounts were thrown out as unnecessary since there are several more; for the owner, there is no big problem to write from other accounts.
Their sending of merits is quite a template; I think that everyone to whom numerous merits were sent may also belong to this owner.