Early Twitter Investor Says He'll Grow More Critical

An influential shareholder in Twitter Inc (NASDAQ: TWTR) is putting on pressure for a big boost in users.

Chris Sacca said in a recent blog post that no longer feels compelled to "defend Twitter at all costs" and that he's changed his stance.

"I never expressed any frustration or disappointment at missed opportunities or any exasperation at what wasn't happening," said Sacca, who held the largest stake in Twitter at the time of its $1 billion initial public offering in November 2013.

Twitter missed first-quarter revenue expectations last month and its net loss widened to $162 million, from $132 million a year earlier.

Related Link: Why Frank Zorrilla Likes Twitter As An Investment

Sacca said he is "soon going to post a few things that I personally hope the Twitter team will accomplish."

The 40-year-old investor said Twitter should soon increase its monthly users to 500 million, or 65 percent more than the company currently claims.

There is "no natural ceiling" on Twitter's revenue, and the company's reach should become "more pervasive and its impact on the world more meaningful," Sacca said.

Despite Sacca's promise to become more critical of Twitter, he cited his "loyalty and persistent gratitude."

"I believe Twitter is a great investment and that the stock is cheap," Sacca said.