I heard a news that they change the minimum deposit but 100K is just too huge, an average filipino won't be able to afford that.
They are not helping the poor to do banking but that's them, there still a lot of banks with low minimum, like the Rural banks.
I haven't had any news regards with the minimum account of the Unionbank Savings account but I checked with their website now and it seems like you are right. The minimum now (As of July 15, 2019) is Php 10000. Not bad, maybe because they want more people to use their banking application and utilities. I don't know. Lol.
Check niyo na lang yung picture na 'to. Nag Screenshot ako on their website. I just hovered on Personal>Accounts>Regular Savings Account
Parang gusto ko na tuloy lumipat ng banko haha. Para lang mas may accounts or something. Not necesarily may laman lang and dun ko lang pinapatengga yung pera ko, mas okay na, na-umiikot yung pera.