F95 affected the rise of Summertime Saga. To deny that is to deny facts and evidence.
It was the 2434th post on this site, 25 August 2016 - just 21 days after F95 went live. It was one of the first 100 games posted on this site. That was only 9 days after DarkCookie created his Patreon account. DC got his first Patreon subscriber on 18 August 2016 and had just 24 subscribers the day before F95 listed the game. One month later, he had 250 subscribers and by the end of 2016, just 4 months after starting his Patreon account and 4 months of being listed on F95 - he had 1,667 subscribers with over $4,000 USD per month of contributions. Also, DC was #870-ish of adult game creators on Patreon when he started, broke the top 10 in January 2017 and became the top adult game creator on Patreon (by number of subscribers) in October 2017 with over 6,000 subscribers and about $20,000 USD per month - just about a year after being on Patreon and listed on F95. And has never relinquished that number 1 status since.
The case can easily be made that without F95 (and, perhaps similar sites in 2016 and 2017), Summertime Saga would have struggled to gain awareness, and thus, popularity, and thus, financial success to be where it is today. That said, it has grown so large since those initial couple of years - with over 24 million results on a Google search for "Summertime Saga" (over 2 million, alone, for video results) - that F95's influence on his financial success today is much less dramatic than it was in the past.