Along the lines of purchasable content being in abundant supply whereas demand for any of it is lacking I’m inclined to think throwing some shards into these Coin Purses for people to cut their hands on is a sensible idea. I see no real reason not to be “generous”. The limitation comes from not wanting these Coin Purses to exceed the ownership value of gems, although one solution would be limiting the purchase of Coin Purses. Let’s consider some numbers.
100 gems = roughly $1
1000 gold = $1
The bottom tier of heroes in terms of expense is $3 with gems while $2 with gold. The second tier is $5 with gems and $4 with gold. The 50%-off sales affect only gems as do bundles. At these tiers you get more purchasing power through the gold in Coin Purses. I say so what? There are 8 heroes in the bottom tier and I think 17 in the following tier. The majority of heroes are a better deal in gems including a whopping 40 who are 25% less, plus Deathwing!
Let’s see what happens with shards. Conversion from gold to shards makes 100 shards = $2. Expensive. The rare cosmetic items are cheap and sell for less shards than gems. The epic items are of comparable amounts, except 100 shards = $2 as opposed to $1. The legendary items are at least twice the amount in shards as they are in gems.
Why not throw in another 50 shards per $1 spent on Coin Purses to match or double the gold to shard conversion rate? So:
Common Coin Purse - $1.99
2,000 gold
3,000 silver (each hero costs 1,000 silver to unlock for a month)
100 shards
Rare Coin Purse - $4.99
5,000 gold
10,000 silver
250 shards
Epic Coin Purse - $9.99
10,000 gold
25,000 silver
500 shards
Legendary Coin Purse - $14.99
15,000 gold
50,000 silver
750 shards
What ends up happening is that as a new player taking the affordable option to deep gameplay access you’re chopping some wood on the ownership side, relatively speaking. On the cheaper items between heroes and cosmetics you’re getting in the neighborhood of double the bang for your buck while getting the gameplay access essential to your experience. This is in addition to treasure chests/loot boxes and in-game currency progression. On the “epic” side of things you’re still doing better. However, once you start converting your gold into shards past the cheapest cosmetics or run into the slew of most expensive heroes without a matching interest in cosmetics gems become a better deal, not factoring in sales or bundles that make gems much more attractive. There’s a place for everything.
The point of putting shards into Coin Purses is to give players a taste of cosmetics beyond the randomness of loot boxes, making the decision of what you get yourself. Again, this game likes dictating content to players - what heroes go into bundles, what heroes are in the free rotation, what items you get from loot boxes. Players are not too impressed with that and can disengage and disregard.