Thus far, the free seals seem to only be a 'start' towards the upcoming stuff for 1.19 like chocobos. I'm not going to turn them down! As was clarified in another thread I was following, make sure to burn all of your seals for all but the company you plan on joining, as they will become unavailable after 1.19 for an indeterminate amount of time.

Here's the thread:
http://forum.square-enix.com/ffxiv/t...ompany-on-1.19