"[Research] PokéStop drop rate changes beginning May 9th"

#PokemonGO: Following the end of the grass mini-event on May 9th, the drop rates at PokéStops were changed significantly for the first time since the launch of Gen 2. Here are graphs of drops by type and drops by item. The findings:Balls drop rates took a cut, moving from about 65% of drops to 60%. The relative distribution of Pokeball / Greatball / Ultraball remained unchanged (72%, 21%, 7% respectively).Potions held steady at around 15%, but interestingly, their distribution changed significantly. Regular potions cratered from 60% to 45%, while super potions got a big boost from 23% to 32%. Hyper and max potions saw modest gains, moving to 15 and 8% respectively.Berries gained a bit, from around 14% to 16%. The distribution remained mostly the same with 50% Razz, though, Pinaps seem to have gained slightly from 25% to 27%, while Nanabs dropped from 25% to 23%.Revives gained a bit as well, going from 5% to 8%. The ratio of roughly 90% Revives to 10% Max Revives held for levels 30+ (though there's not much data for this).There was no significant change in the drop rates of evolution items, with only a tiny gain to around 0.1% of drops. Oddly, there was a large spike on May 8th, where evolution item drop rates more than quadrupled to 0.45% of drops, but that was quickly reversed.There seem to be two tiers of evolution item drop rates. Sun Stone, Metal Coat, and Kings Rock drop at around 24.5% each, while Upgrade and Dragon Scale are around 12-14% each.The first day of the change, on May 9th, the rates were very different. Ball drops went all the way down to only 50%. They changed this for May 10th, and it’s been steady ever since.The data holds steady regardless of trainer level (once past the start of the game). The stats are based on the number of total drops, not the chance of gaining an item from a spin.The new drop rates:TypeOld %New %Balls64.5%60.1%Potions15.7%15.6%Berries14.7%16.2%Revives5.0%8.0%Evolution Items0.09%0.11%ItemOld %New %Pokeball46.1%43.2%Greatball13.8%12.7%Razz Berry7.3%7.9%Revive4.6%7.4%Potion9.3%7.0%Super Potion3.7%5.1%Pinap Berry3.7%4.9%Ultraball4.6%4.2%Nanab Berry3.6%3.4%Hyper Potion1.8%2.3%Max Potion0.92%1.3%Max Revive0.46%0.61%Edit: There are over 5 million item drops analyzed here from hundreds of trainers of varying levels from 0 to 30. The data at level 30 gets spotty, but follows the same pattern as lower levels. The past few weeks have around 100k-200k drops per day. via /r/TheSilphRoad http://ift.tt/2raaT5a