Doesn't constantly swiping right mess the algorithm on Tinder, meaning you eventually have to make a new profile?
Pretty much, yes.
The way Tinder works is that it starts off assuming you're really hot, and it shows you to really hot girls. After a number of people have seen your profile it can see the average number of showings you get before someone swipes you back. So if you only get say one swipe per hundred shows, it works out that you're not hot at all, you're a bit of a minger. But it wants mingers to enjoy themselves too, so instead of showing you to hot girls, it shows you to mingers - the girls that nobody swipes on. That way you're more likely to get matches, even if they are mingers.
It also has something called a Noobie-Boost. For people just on, it shows you to loads more people, you're "fresh meat" which is good for everyone to see, and they want you to have a good experience and pay for the upgrades, so they show you to loads more people in the first few days.
So swiping right on everyone, especially as (no offence, me too) an old bloke swiping right on 20 year old hotties, the quality and quantity of matches is going to go down - it's going to see your success rate, and deliberatly reduce the quality of who you're shown to, as a favour to you. So you are better off being as selective as you can, that at least will slow down the rate at which it works out what you really look like.
But actually the simple and best trick is just to completely delete your account once it gets stale, and create a new one. You need to do this using your phone number, not a linked facebook profile. Because of GDPR it has to genuinely delete your identity, then you start again 30 seconds later uploading the same pictures and writing the same drivel, and where you might previously have been like tumbleweed in the desert suddenly you're awash with new hot matches. If you have upgraded your account as you mentioned, it will apply the upgrade even after you delete and restart, it just takes about 24 hours I think and you'll see your account upgrading - it does it based on your apple account, not your Tinder profile. So that's my top tip for Tinder. Delete your account every couple of weeks, start up again, and it thinks your Brad Pitt until it works out otherwise.
I've never used it for SB / SD / Hookups, I used it to find girlfriends after my divorce. Tinder was pretty shit, Bumble was much better and I've been out with some cracking girls, several for 6 months or so, and I'm confident now of being able to meet the love of my life when I next feel like going on that journey. But, every now and again I've met someone pretty interesting on Tinder - a lifestyle dominatrix who lives round the corner, a Braziliian girl who just stood in my front room and took all her clothes off because I wasn't getting the hint, and a girl who likes to film herself giving blowjobs to strangers in public car parks and send them to her boyfriend. We matched, half a dozen messages later and a 20 minute drive and I was being very enthusiastically gobbled without even the inconvenience of leaving the driving seat. We did this half a dozen times until I started going out with someone... hmmm might give her a ring later!
So I hope that helps generally with Tinder. I'm at a cross roads, I'm single again, quite happily so, might try your technique to meet an SB for some fun. On the odd occasion I've told it to match girls in their 20's out of fascination, I too have been approached very quickly by "that type", though never followed it through. Yet.
Good luck!