Is it ok to change the RULES halfway through a game?

[anna Acanthus]

Yes of course it is in this case.
And as it is free it can hardly be called false advertising either.
Everyone and their 10 or more alts can get one so it's hardly a big market deal.
A few may have been disappointed that they were'nt in the know in time, others would like to try for the whole range.
I hate seeing disappointed people too and i'm glad the team try to make everyone happy.
It's a lot of fun to the newer breeders to anticipate which costume they may get and maybe who knows, even a special size.

As to the benefit for KttycatS, in the past we had only 3 days to get that special and so they made a load of L$ on Love 10s which of course they don't anymore with all the extra time we have now.
We also used to have very little warning to be able to prepare for these specials.