From now your limit of ponies increase when you improve your status class :

Flint Class : Beginner Status.
Limit : 75 ponies.
Maximum Fairy Golds earned thanks to your ponystars : 10 000 Fairy Gold.

Quartz Class :
Limit : 80 ponies.
Maximum Fairy Golds earned thanks to your ponystars : 10 500 Fairy Gold.

Amber Class :
Limit : 90 ponies.
Maximum Fairy Golds earned thanks to your ponystars : 11 500 Fairy Gold.

Sapphire Class :
Limit : 105 ponies.
Maximum Fairy Golds earned thanks to your ponystars : 13 000 Fairy Gold.

Ruby Class :
Limit : 140 ponies.
Maximum Fairy Golds earned thanks to your ponystars : 16 000 Fairy Gold.

Diamond Class :
Limit : 190 ponies.
Maximum Fairy Golds earned thanks to your ponystars : 21 000 Fairy Gold.

For more information about Status Class, click on "{YOURCLASS} CLASS" (title of the 5th block menu of the left).