Anyone else using third-party sites for cheaper game top-ups?

So lately I’ve been finding ways to top up my favorite mobile games - PUBG, Genshin, Mobile Legends - without paying full Google Play prices.

I tried a couple of random sites in the past, but some were slow or sketchy. Recently I came across ManaBuy.com. and it’s been pretty solid - usually 20–50% cheaper, delivers instantly, and supports PayPal/card payments. Last week I grabbed PUBG UC while I was still in the lobby, and it showed up almost instantly.

Now I’m curious - does anyone else here use third-party sites for Android game top-ups? Which ones do you trust, and how’s your experience been?