adguard vpn is not traditional server side vpn. It is internal to your phone (tech details are on website). To use with adguard blocker you must set compatibility mode in settings. I installed free version last night and shows 1.65GB traffic so I don't know where that 50MB cap comes from.
Best real vpn for those who asked is AirVPN. Founded and run by long time privacy advocates, fanatics and activists. Based in Italy. Requests for info from L.E. or anyone else go directly to garbage with canned response that they have no info to offer because they retain no info. Has many servers and options. Special servers for access to sites that reject known vpn's. No logging, restrictions, caps, etc, and torrent friendly. I've used it for years on all my devices and trust it implicitly. Not super idiot proof, especially re: port forwarding and some other more arcane features it offers, but if you're reading this you'll have no problem. I'm an old man and I figured it out pretty quick. lol. Also, 5 devices/account and proprietary UI for all O.S's.
if I've helped you.