Based on the evidence you are citing, I would say it is more likely they are in some kind of business relationship than the two being alts.
Technically speaking, BestWebCreator didn't offer shilling services (he solicited a TG handle in response to a solicitation for these services), but if his name pops up in a case of likely paid shilling, one can make a reasonable conclusion.
I don't want to get involved in forum drama, but I also don't support the flag against CryptoSparks. I would describe what he is offering as similar to
GunBot, who has many vouches from reputable forum members, the main difference being that CryptoSparks has settings 'pre-filled' for his customers. GunBot also appears to have what I assume to be paid salesmen, and although I don't know the specifics of the commission/payment structure, I think it would be fair to say it would be similar to what CryptoSparks is offering in the thread you describe as "offering to pay for shilling".
CryptoSparks loan request was a little scammy, but a lender could negotiate better terms that would better protect the lender, such as asking CryptoSparks to put up some of his own money that would be used to cover the first trading losses, if any.
I would not personally trade with a bot I didn't code myself, but I cannot deny this does not commonly happen.
CryptoSparks made a number of critical errors that completely undermined his credibility as a prospective asset manager:
Apart from the very childish and atrocious attitude which has already been discussed at length, here are a few breaches of trust that would justify the flag and disqualify him from any serious business proposition:
1) He claimed his bot returned 480% in 20 months, it turns out these were just pro forma backtests, ie: NOT LIVE RESULTS (presenting a backtest as real trading performance would lead to the revoking of your license as a CTA or asset manager in many jurisdictions, including the United States, where legally you can't even publish live results unless they are audited by a certified 3rd party...)
2) He was visiting the forums at the beginning of every month and publishing some Bitmex trades, claiming that he already had a very profitable bot working very well for his investors going as far back as 3 months ago (as AdolfinWolf quotes
here ). Later it turns out that project got scrapped, and now he has a new bot called Arakne, which begs the question:
what happened to Phoenix and your earlier investors bro, and why you are down to trading with nominal lots of 10 USD in a massively leveraged exchange, where you used to do round trips of 10k USD or greater just a couple of months ago... How many people got rekt already because of your immoral marketing tactics and shamelessly deceptive presentation of your experimental bots?..As it stands, unless CryptoSparks tremendously improves his honesty and ethics, a warning flag against him is very appropriate.