https://en.numista.com/catalogue/pieces40654.html
First of all, please read this statement by the Central Bank of Timor-Leste:
https://www.bancocentral.tl/uploads/documentos/documento_1460994733_2602.pdf
Indeed, the bank issues coins for circulation, in order to replace a lot of the 1 US Dollar notes. Now look at the mintage numbers. 2000 coins is a bit little to replace a note in a country with almost 2 million citizens, methinks.
Now look at the official proof packaging: http://savepic.org/4894824.jpg
Note that the number of proof coins (clearly stating that these are not for circulation) is set at 3000. Also notice that the weight of the coins is 7 gram, not 14 gram.
The number of coins for circulation is actually 50.000.000 ( also discussed on this thread of this forum here: http://www.worldofcoins.eu/forum/index.php/topic,19341.0.html ). I am in Dili, Timor-Leste, right now and I can confirm that this is true. Just for the idea, I only get these 100 centavo coins in change, not a single 1 dollar note is in sight anymore. I have over 20 of these coins already. The cash till of the restaurant where I just ate had over 20 of them. So, together we already own about 3% of all the 100 Centavo coins, right?
The reason why I can't edit this is that apparently someone claimed that 'the numbers have been verified', which apparently means that corrections only can be made via the forum. Kindly asking a moderator to update the numbers.
Thanks!
P.S. I actually noticed that the 2017 25 Centavo is significantly different than the ones issued in previous years. First of all, the reeded edge is different (more reeds per mm), and also the planchet is thicker. I don't have my measuring gear here, but it's probably about half a mm. Quite much. The statement by the Central Bank of Timor-Leste also confirmed that the metal composition has changed.