As a sitter, I agree with the others commenting here that it is indeed very flattering.
I would add however to please bear in mind that not all sitters are full-time sitters (myself included). And are only looking for occasional sit/travel opportunities, when it suits them.
So if they do not respond, please do not get offended. They are maybe not even checking their inbox, and only logging on to the site when they are looking for opportunities that fit their specific criteria (specific date range, duration, location, kind of pets, etc).
And definitely please do give new sitters are chance. They should at least have ID checks and references I agree - because in my opinion that is simply lazy to not get those arranged for one’s sit profile. But indeed all 5* sitters have had to start on a sit once with no review under their belt. (And I am so grateful to the first owner who trusted me!) I would trust your judgement after speaking to the candidate sitter, asking questions, live on a video call.
All the best.