Stifel analystBrad R. Reback upgraded Datadog Inc (NASDAQ: DDOG) to Buy from Hold with an increased price target of $140.00 from $98.00. As per the survey by the analyst, installed-base optimization showed a marked decline (~38% vs. 50%) from thier prior two surveys. Around half of the customers who are still optimizing indicated they were close to completing their optimizations (an improvement from 8% in last survey), writes the analyst. Related: Datadog’s Q3 Earnings Ripper, Stock Soars On Strong Guidance Consequently, the analyst says this aligns with current consumption commentary and bode…