Royalists out to Join Maoists: What does it really mean?

Was just surfing news story and came accross this nepalnews story:

Royalists join CPN (Maoist) party - From Nepalnews.com

So the trend of Royalist joining Maoists is increasing day by day. Even Kamal Thapa, Royal home minister have publicly said that he could make alliance with Moaists. Royalist going to way of republic but for what?

Of course they won't join a party which advocates for end of monarchy without any benefits. Are those royalist just following trend of water or something is really cooking?