Before I had to leave PokeCommunity due to family issues, I was in another journey RP. Posting had slowed and it died soon after I left. When I got back, the first thing I wanted to do was join another journey RP, but the one I wanted to join (it was fairly new and I didn't want to join one that was already far along) was already full. Eventually I joined other RPs and got too distracted to look at any of the new journey RPs being made, but when posting slowed in the RPs I was in, I noticed Bleacher mention this one in the discussion thread. After offering a very small suggestion, I realized this would be the perfect chance to enter another journey RP.
TL;DR: Activity was slow and I was bored so I joined.