I want to clarify that I will only take into account the skin rewards.
Let's start with fortnite:
if we want to get the battle pass directly at level 100 we would have to spend around 12,800 bucks which translates to around 100 dollars.
we can also get to level 100 just by playing and spending on the basic pass which costs around 8 dollars.
rewards only in fornite skins:
13 skins in total of which 4 are recolored,
total: 9 skins for 100 dollars.
Now let's go with dota 2:
If we want to get the pass directly at level 100 we would have to spend 45 dollars, 55 dollars less than in fornite.
In dota we can also reach level 100 just by acquiring the pass at level 1 and buying a pack of points for 5 dollars.
rewards only skins in dota 2:
10 chests = 10 full skins (with the possibility of receiving additional rare skins, etc) and not counting the immortal chests.
in conclusion
fornite: 13 skins (4 recolored) for 100 dollars
dota 2: 10 skins (with possibility to get some extra) for 50 dollars.
if there is anything I am leaving out you can let me know in the comments below
I don't understand the complaints, thank you very much and sorry for the english.
Source: https://www.reddit.com/r/DotA2/comments/x4eudi/battle_pass_is_really_profitable_comparing_battle/