Solved

Lack of new players

Not sure if this is a bug or not.  Usually the league I'm in (Full Throttle Racing) used to receive plenty of rookies and pros.  One day all inactive players were removed by the game.  No one has joined ever since. 

Same thing with me and my league, my rookie league is now down to six team's and we haven't had any teams join for weeks now. 

There are probably to many leagues altogether.
Try promoting your league in the forums.

Same in our league 

I've tried, although it doesn't work so well.  There was one day where, as with Wayne Gibbons and Way To, most of the players in the league were removed & no-one's joined since.  And it's hard promoting, as many do at once, and people tend to join leagues that usually have more players.  But I'll keep trying.

Same for our league. Down to 3 Rookie players with no new entrants for a few weeks. It used to refill almost instantly even with the high turnover of new players. Would be nice to get an answer about why this is happening. 

Was it just the rookie league that was affected for all of you?  Or was it all the leagues?

It's only the rookie league that has been depleted meaning promotion is not happening which then means pro league is not filling then the inactive teams in Pro are removed so then no promotion to elite... It would definitely be nice to have one of the devs look into this ?

just hoping that the devs manage to see this thread, especially because i've seen a lot of depleted rookie/pro/elite divisions across multiple leagues

Hi guys, the amount of new players joining iGP and leagues will vary, sometimes wildly, depending on seasonal interest in motorsport and our advertising campaigns. Additionally, new players are actively steered towards leagues with active or almost full Rookie tiers to ensure they get the best experience, and there are thousands of leagues. This is further compounded by players having different preferences on what days and times to race. Hope that helps!

In our league, we always have the rookies filled, and we clean the non-actives after 7 days, in pro not really but it works

Same in our league. Stopped from one day to the other weeks ago.
Before that new rookies joined daily.
Also our league doesn't show up in searches.

There are although Yunis s answer is credible , fewer players playing the game or have left. I am one at mo left for more than a month. Not in a league. 

There is an issue with the league searching, I've tried doing a search by start time, or even to just find 2 car leagues, and the results don't accurately reflect this criteria.