Aren't all card games in some way Pay to Win? I'm playing Gwent since (Jan 2017) and I started to be more active player after Public Beta and right now I have more than 60% of all cards + more than 10 000+ scraps ready for craft anything + a lot of duplicates for mill. You just have to be active and you can open each day min. 2 kegs (Tier 1 and Tier 2 rewards (175 Ore) + GG, Each 2 wins reward). + season rewards + rank up rewards. I think CDPR is really generous to all players even to F2P
In other card games like HS you are not able to open 1 pack per day (or it will take much much more time than in Gwent). In HS you are able to open 1 pack per 2.5 days (with quests).
+ Most important question isn't: Get to the better rank but how long you will stay in this rank
If they are really bad they will drop or they will never get back in next season