katulad mo rin ako noon, took me sometime to understand 1st consume. walang sumasagot sa tanong, you just have to go through some old post and decipher it. Pero to save you some time i'll tell you (paying it forward).
Sa giga promo subscription meron 2 data allowances, yun
Daily Data Allowance (1gb or 2gb, etc per day) at yun
Shareable Data Allowance (1gb or 2gb, etc) as per subscription ng promo.
1st consume means yun "Daily Data Allowance"(refreshed every after 12midnight) mo dapat ang mabawasan di yun 2nd allowance na "shareable data" (di nagrerefresh-dependent on the date of subscription).
Purpose? to maximize the usage of the given data allowance since nag rerefresh yun Daily Data at yun Shareable Data hindi, pag na fully consumed yun shareable data some people said di na sila makapag connect. Hope these answers your inquiry