My account's over a year old yet the last 400 subsribers have come in a few days. This is not a miracle but the result of literally asking everyone I know to subscribe and asking them to share it with their friends, group chats, etc. And also looking for people offering sub for sub in YouTube comments, forums, etc. Basically just spending a lot of time nagging for subs. I'd recommend for a quick boost but long term you want more organic subscribers. But that'll come in time for me when I upload more (tomorrow I plan on trying to record months worth of content).
500 Subs Giveaway: https://gleam.io/competitions/lwUhb-5-amazon-gift-voucher
500 Subs Giveaway: https://gleam.io/competitions/lwUhb-5-amazon-gift-voucher