Science fiction must be the hardest to find reviews, I guess?

Twice I’ve posted a book on goodreads for review, and all I’ve gotten are those asking for money for it. Not all reviewers mind you, those that know NOT to ask authors for PAID reviews (that’s a big no-no on Amazon), but generally more than I would like responding. Science fiction gets me the least amount of queries, while romance and non-fiction get tremendous amounts.
I know they are the dominant genres, but man, where are all the sci-fi readers? Perhaps they’ve been flooded with books and are too engrossed to take on any more, or maybe, they’ve become overtly selective on which sub genre they wish to read. Either way, finding reviewers for sci fi has become problematic. Well, for me it has anyway, I have no cash for services or paying for adverts galore, I can’t even afford to join a virtual book tour or on Goodread’s giveaway.
Free ebooks for reviews is all I can offer. In this time of COVID uncertainty and social upheaval, I guess many are in a similar bind. If that’s the case then please forgive me harping on this subject. Frustration is setting in and I’m at a loss on what to do next.

Pardon my rant,

Stay safe everyone!

Jeff W.